Malicious PDF — malware analysis report

Static analysis result for SHA-256 9782baf86a3a3a72…

MALICIOUS

PDF

76.4 KB Created: 2021-08-17 05:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b6dbce0c587a08c2333c91b856c72b3c SHA-1: b7b424232d5cf33c2995c6d6d1f59aa5949e72a3 SHA-256: 9782baf86a3a3a7267457ce79642e1c7a02617e0bdbf8db35f96c68699a6a8fd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on disposable hosting indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://garglob.ru/uplcv?utm_term=numerical+analysis+timothy+sauer+solution+manual+pdf PDF link annotation
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160881ad7d97d1---vasejozesogofade.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/312ba2b60ca6dd1d2dd616fa9e058f17/malakunolibaz.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/wotorosiminobixupipolibaj.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608f39bd1a171---kibix.pdfIn PDF document text
    • http://salkim.com/userfiles/file/35052901716.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/basasotogebo.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/1161581551a44d1679a570f707a78842/58279670252.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/tozowogiro.pdfIn PDF document text
    • https://htchninc.com/d/files/1069749278.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b301351fef---53048337756.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/26267332975.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/14955444146.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/pavonin.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/jemizagalodam.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/vomoxavemivolasenofofuk.pdfIn PDF document text
    • http://benly-carson.com/product/files/23960665048.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae831fae6dd---gipafogisidevatamonarakop.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807c90ea161---33342520020.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/71907970304.pdfIn PDF document text
    • http://www.bandungmesin.com/file/komojowonifemoxof.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/34973007040.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/85904951514.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b600ac8e7c69bc1f3c799cd3c7c5fdf2/55337117551.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/052sk8g220q9ns83tu5ilk4bog/30155055906.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f77dafc7b---68621558779.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/2663988626.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_off0000c41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 11076 bytes
SHA-256: 10bebaaf9e75e6f4242eba6304fb3fe5e3ad77002089bc08aff4f7e6f6f43f4d
font_02_sfnt_off0000f5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 16872 bytes
SHA-256: e4560521feecebbaa905f38389758e0f7041e5ae15606931d07d362a824ce0cf

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