Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fff36837f9a2cb2…

MALICIOUS

PDF

88.5 KB Created: 2021-07-08 05:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 232d7b7754ba3be700bdd1a3579d6ca5 SHA-1: 00a9602446799f4751e737577ac2116c92fd3e5e SHA-256: 6fff36837f9a2cb2026fcf7fcc65ac3c6532d16ef1a409b6e72c55ecb07b65f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://irlanc.ru/uplcv?utm_term=1996+dyna+wide+glide+for+sale
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075ba97b1c71---vasewolar.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/1335hrosrmt2is20dpsjetrta3/32694404418.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb58ad05149---kabebabeperojifebo.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773bed33131---15751007461.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863f90b8eb8---mafoxalanurux.pdf
    • https://congchungnguyenlieu.com/uploads/files/fumevedekelokisarusala.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d52e4f8e4---julavimipebekipatosav.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609dab5cd15fc---viludugurikurujitusejamo.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5238636ae---tararamavasetekixinuxu.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c15d78a81f---kojudakezipefepusir.pdf
    • https://flyags.com/editorResources/file///lozixanamu.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/eb58ffe5c1526408f7b56091bbce80a3/dosetaded.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/a46a419ea6e453a28b0f877f6f93e838/23091478741.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/sopag.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66d2beaa63---dututirulojapipob.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/453bee306a5b4b75ff8b552f11bc25de/tisanotubigi.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/bki31dvd9cuh675bmosoresvsp/gojutezawoz.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/hd3ggr7vdlk3i2p4o4es6klcp3/68786209998.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52f9c3990---17690213507.pdf
    • http://www.contectrade.hu/fckfiles/file/48472657033.pdf
    • https://aimara-bg.com/userfiles/file/30402191804.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/bosuniju.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be1b39c38cd---27267804246.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/acdc21b922b38e37cbc779ec9479d7c5/mutiwonorimitadonan.pdf
    • 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_off0000f436.bin
bbeebe9089a2102c869eefa054b1558ca4af8bfce2b22ddde552494872f9d300		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 17940 bytes
font_01_sfnt_off0001238b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238B 16792 bytes
font_02_sfnt_off00013ba2.bin
7d5cdd8f323e05e1ab114844f1cf8c3eb41dbbb9e6f97f98e98299c9fcdbdc50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA2 10924 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.