Malicious PDF — malware analysis report

Static analysis result for SHA-256 46204c764051f124…

MALICIOUS

PDF

88.9 KB Created: 2021-08-19 13:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1aba0e80a62419f9415adc1647568d8d SHA-1: 882e68cddd194f2f6e1d3717dfc9152004b34e34 SHA-256: 46204c764051f124080b651bcbe4221c89f3e717b50eb197aa0523e0d41fe8a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites, suggesting a link farm used to distribute malicious content or host phishing pages. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c754164399---55876579163.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9c8491272---firipojuxesa.pdf
    • http://spec-so.ru/sites/default/files/file/69346761479.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0ac4ae438a---99905208624.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a646793d3---65058434264.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2767eac68---25619720001.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f7b1a22663e520dac5849c276a9e2777/83440839894.pdf
    • http://d4sontario.org/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/31978321535.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/4cacb21eef7e778668eca2406aa3d7df/82007827077.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4f7be1076---femufanozetiginanad.pdf
    • https://kaisar168.com/contents//files/xomadamatoler.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1lkt0kks45ri8lprbpbecd7001/14154365004.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f98ee14cd---58884370290.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16074c09057761---mebakapodujed.pdf
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/tixalevuvan.pdf
    • https://usdcp.jp/user_data/userfiles/files/7460356417.pdf
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/mevoj.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/gusedoranazixiza.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/qs52mfmshr06oclrfeug68rf7n/rizoruxovu.pdf
    • http://4seasonstours.in/userfiles/file/48539237388.pdf
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/
    • http://soeurs-scjboran.fr/soeurs/upload/files/xusanepik.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=can+novolog+be+used+for+sliding+scale
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 16792 bytes
font_01_sfnt_off00010fce.bin
9d840a061e6fa5d10a4521c2821ff9f313a31a9877faa9cf7bf4d65f0fb32fb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCE 16912 bytes
font_02_sfnt_off00013bb7.bin
cb32e11342c308b30030f6b6880411a0a853112dfd6e6acaaadbd62c27afcda7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB7 10892 bytes