Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47fa93f5535ebe1…

MALICIOUS

PDF

91.0 KB Created: 2021-07-21 21:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b14c3a8619d7a9d72c1886dbc757eafa SHA-1: df84372c890adb7ae62841d76d8b1e43328b24a2 SHA-256: e47fa93f5535ebe19c476d22f44ad02391b23e102e03753f5497ae4f1c87cdde
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the structure and numerous external links are indicative of a phishing or downloader lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.accl-calibration.com/login/ckfinder/userfiles/files/99898400255.pdf In PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/90976281432.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc2ffbdcce---fifuvagivelilom.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/wevunagopenapu.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d2360633aab---masidogafadozakexazizurut.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ak9og438pftfiip6prd9kprp2b/nuvewepariwimetitovu.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086ab7647cd9---20324976181.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4403a6f34---66893875300.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d3b416a8fe2129ddcf3d40ff82b3cf77/30919868925.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c1fbd3115---fusirepamovizaw.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72c0009c16---modizoxel.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f7b2f25be---93942902955.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9392fd3d7f---rimezugofupewume.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/niwisarulegopenozuwe.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/pizevifupisugovubadipuza.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/cf0ade6eddad3bd215f144b24a3fd5b5/tiwirew.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/94e058848b0a6fea7432ea78b38deb26/vaduxumekigutuwogosif.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2e05c3a2f---39994723081.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/c5e1e47c6ffbff56e9512d079ec73fd8/vobebapatafojaxalawu.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/74225506083.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/49668432281.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/xetaxijipinev.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/36447281986.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/legufexebunupodofo.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/36aa3356b3580b34591dafbafda513b0/57292374806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=notice+of+eligibility+and+rights+%26+responsibilitiesPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/fe623dfb750e550cc2e7a7ffa198b502/rariv.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7B 18376 bytes
SHA-256: 06e6e7771a048ede874ef66e0668f42e0088aa8bbdd413ea7be68e7b3c38f5bb
font_01_sfnt_off00012c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14496 10984 bytes
SHA-256: 00924fd1434bc317da9ea8a5b7786e30f3878eb62901db3ce2abe7b326f2a3fa

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