Malicious PDF — malware analysis report

Static analysis result for SHA-256 802bb3d1ab2d383b…

MALICIOUS

PDF

89.6 KB Created: 2021-07-27 20:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2095374ff5d0addfeace1eafad602cfd SHA-1: 9ee22cbd76ce3ccaf90f85abab56d1c1f563d213 SHA-256: 802bb3d1ab2d383bee1cb119eab03f809c8cb2a80d499f703503c705146f48a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing or malware distribution vector. The document contains a large number of external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed for SEO manipulation or to host malicious payloads. No scripts were extracted, but the overall structure and URL analysis point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://mytalk7.com/_UploadFile/Images/file/76770311257.pdf In PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a73647ca17---joluxorufofigita.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/vunerinuludiraxunote.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/57028062124.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/58552330375.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609828361e960---mefuvodoxevun.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/60976543045.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/88267390210.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/wupuxowixilupesezezukuzi.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db044a856d9---94057240067.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/88331560602.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/12495607747.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4635e143e5---34856249760.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de93182f1da---tevetojebetage.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/26446189013.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/11662930685.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/55062469056.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/76526313092.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/wanupokikene.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c65cfc566c0---vugetigavixodavi.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210704_265A092D585E070C.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c035063770a---vobopalulajovazivamunade.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/donazene.pdfIn PDF document text
    • http://sweden2020reunion.com/clients/e/e2/e2375cbe45a1e08e95d3a39ca41e84e3/File/fupakip.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a954e6d4a3c---16848572223.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607adc94b24f2---64664396200.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=yayati+marathi+kadambari+pdf+free+downloadPDF link annotation
    • 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_off0000f43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C53 11012 bytes
SHA-256: c07c0c8874d7cc20d4b84485b435779e38f6e902d818cd68a59a0b34234656ec
font_02_sfnt_off00012579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 19012 bytes
SHA-256: 615b1d68b061ef3bf4e9c2a0f3cb6c17e13cecdf7fcdd8ebeedbee265fdaaa9b