Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96eb27008b93269…

MALICIOUS

PDF

89.1 KB Created: 2021-08-11 08:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 46604e8626cb02a028651750d4daf6b1 SHA-1: 1c2aaeb694ce5460143b97750cbd2c017cf00bec SHA-256: d96eb27008b93269d2024a05992b5daab1e485c3ac3acb1a84070725f693d8d5
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised CMS uploads and disposable hosting sites, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecd1835a870---52084995000.pdf In PDF document text
    • http://chandigarhdatarecovery.com/files/file/dariza.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098479cee69d---sopimivotila.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210630134203_ht8czz.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/taluwetibaregaj.pdfIn PDF document text
    • https://sayurmateng.com/contents//files/99429619655.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607676a44310e---feguju.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/nremkbt25dvfks9o3d8hu62at2/leximizunug.pdfIn PDF document text
    • https://totounited.com/contents//files/8725146336.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/8120773391.pdfIn PDF document text
    • http://markone-tools.com/upload/files/62033277565.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/kotove.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f3c4a1c9f---vekev.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b0bf3e31aa---litimowenuvusonixej.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/5672624127af29127a2be53fe1cdee89/78929656730.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/fadifogawobazotem.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a71f298044---96822105105.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ctb358k7cdt99ae9ffreo0ual3/bozubapus.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/pivuleneziluzoduzaz.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k64qi8sj5tromcpjjm68op0qn0/kefatobusafusubufavowo.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20f587bcf3---68411227989.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/2tvjsvdcbt4s5vco2hmjp6v2g2/77343026848.pdfIn PDF document text
    • http://manleyboone.com/clients/3/3d/3dd19be848c73b0ce3a0430f7fd535f3/File/35148116493.pdfIn PDF document text
    • http://adveotec.com/img/file/45061280363.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/7fb12457f8a71983e1b50ca72a0da502/nonekosanilapomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+loneliest+girl+in+the+universePDF 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_off0000fc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3B 10352 bytes
SHA-256: a6bb8a97159a8812e7d3b5b95886f1997d31cdadb769883203012b4d5341e887
font_01_sfnt_off00011397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11397 16616 bytes
SHA-256: 92818c4f8fc0eacadafc762aefbb55bafd31008d2b98ba5f015d7d126f0eb93f
font_02_sfnt_off00013ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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