Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f044270f817ea3f…

MALICIOUS

PDF

95.8 KB Created: 2021-08-12 08:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e3689af7a7328bec9a9f8e5634de0a48 SHA-1: 4f22f6263573a82bbcf547eb4fa1c9fb007b2af7 SHA-256: 7f044270f817ea3f2c1c682a079397a8b5629170ec82385c6a116e49b5c525c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains a link farm pointing to numerous disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to potentially compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://anmimar.com/royal/userfiles/file/55910420158.pdf In PDF document text
    • http://piazzademarini3ge.com/userfiles/files/timokozi.pdfIn PDF document text
    • http://balone.net/_upload/file///50249338453.pdfIn PDF document text
    • https://steammining.com/userfiles/file/1865664565.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f940426492c---zemijumerekilavuvupowal.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/wewonogitirajidolab.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160817164072e6---53713068139.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/35268073343.pdfIn PDF document text
    • http://wrhs1976.com/clients/0/08/080801f2a31a95d446b71e9836a5425d/File/50371837268.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/18011020816.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/lffs2qq5b3qce201lmsdct7l34/nedejunosatolezubigo.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16079b9df6ca61---95473635569.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/5248065447.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc29e3c3e---kogonolaw.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/47469023052.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/zusevezofaxutazikag.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/26410752518.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/lamagox.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/28069196680.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984d43efa26---28853149193.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/15276472973.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f9d439eb47c---15275421168.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/gokumoxerapepumurorepiva.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/20573959069.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/gijidogonopekegajukowejoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=manual+aire+acondicionado+port%C3%A1til+philco+3500w+php32h17n+fr%C3%ADo%2FcalorPDF 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_off00010aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B8 11652 bytes
SHA-256: b4843103ed1b7a1d29ce7d3ab58f232f345c25e3746179af755ff04b849540c9
font_02_sfnt_off00013e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E22 18744 bytes
SHA-256: a20d39a80380fb1a9e383345f934623cd104ebf34cb2e3ba7b702c1a314f9931

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