Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4061022fc48e1c…

MALICIOUS

PDF

73.7 KB Created: 2021-04-26 14:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 027377214f91c0f9a6c9a7d410071634 SHA-1: ab13a4c9e1fc3f2f2bed4b208f7d106487926359 SHA-256: 8f4061022fc48e1cd4de24c031114595dd7cfba59eb9bedc705a8abea350069a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('fokemale.ru') and another to a potentially malicious PDF ('funseeds.site'). The presence of these links suggests the document is designed to redirect users to harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=what+is+the+main+idea+of+casey+at+the+bat PDF link annotation
    • http://funseeds.site/31123776781pzlcn.pdfIn PDF document text
    • http://mysteps.online/9756704148198v5n.pdfIn PDF document text
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/pedukumuxixag_zunejug_nupesel.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/fanaxus_tonenekugisem_pifufofe_bebigosud.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/rifefikipegunorixozi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390660/normal_5fddbac25aa2d.pdfIn PDF document text
    • https://jabapimodixo.weebly.com/uploads/1/3/5/3/135314731/votexob.pdfIn PDF document text
    • http://kwini-fini.online/lg_model_lmv1813stz6ske.pdfIn PDF document text
    • http://idealslimitalia-official.site/48577724327eka22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487658/normal_5ff26a28c8bbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_600505e6ba94e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rawatakutuju.rf.gd/pengertian_biosistematika.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_48f5b8fe7d4b4dfda607f2907af3698f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/batiku/xemuv.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/55972743184.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/jukufipup.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_41785f78d5214d20a2aa71f678e65bfd.pdf?index=trueIn PDF document text
    • http://feramivo.rf.gd/noco_genius_g7200_best_price.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/tozuv.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_21f524962bf64f1c8c0eb3a45f04e398.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 5388 bytes
SHA-256: 0b5a6d073643386d6eacfa859f93f760cef70249da8681be539afef68e073ab2
font_01_sfnt_off0000f57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 10532 bytes
SHA-256: c1a38ec71fa3f637543b128db26c64478d2813a9ad4df14d10d23e306b59b48c

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