Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfb5a43e72038b1…

MALICIOUS

PDF

78.1 KB Created: 2021-08-29 15:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1532f83d50cbcafdd5a724bfd1751201 SHA-1: ad415e6cf484e9a80870fb4a69ac37445963d242 SHA-256: bbfb5a43e72038b19494876281f0baf0454293d43a23c9b04ee213ee946f7f37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised WordPress installations or disposable domains. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages, aligning with the characteristics of a phishing attack delivered via attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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 https://pixomot.ru/uplcv?utm_term=permanent+lip+blush+before+and+after PDF link annotation
    • http://goopenapp.com/uploads/files/rijar.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f78e30c6e---felagizixazijawulesi.pdfIn PDF document text
    • http://husplaza.hu/editor_up/18009707421.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/28120310419.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16112688cadbe9---xesopovagoluvinolipunese.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/73377054886.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/bifediguvulata.pdfIn PDF document text
    • http://movementlab.dk/userfiles/file/gobuzawenixigewipudijol.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/896a9478e0912c70802461fe87a3bad1/7478065300.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/guvutoromatiwo.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/fa218b67d994cd836dd461ef683f8124/kupasererulamisudizirevu.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffe018861b---jonagutawulenagugimesewi.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5822d97550---gilatubavizele.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2024068dd---8149761222.pdfIn PDF document text
    • http://kccmaul.com/files/files/69549416421.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9b90441887---75766744854.pdfIn PDF document text
    • http://iworking.vn/uploads/files/32826860550.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc84d97805---wisozazaboneborixusova.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/tisojipo.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d544151412---52087331798.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085a344b3e8d---81409347886.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3704044e3---xerin.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161256f1a47f0d---10126446173.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075699439e27---88344021550.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/12369069178.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_off0000c976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC976 11004 bytes
SHA-256: 8e459886f9f1d8335df94ecaa3ac56d97dc85f8fa941229f98e8d46f18cc5532
font_01_sfnt_off0000e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000faa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA3 17680 bytes
SHA-256: deb8536d18852ad1116160277309a7dc26dea92c5473acc86c1ebadf43839dbd

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