Malicious PDF — malware analysis report

Static analysis result for SHA-256 feee6533f726cfd4…

MALICIOUS

PDF

83.1 KB Created: 2021-03-30 22:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 01bc3e275ba4acc9f70a9e3f26b2f825 SHA-1: 3602154033297c705a40058d566ab01aaf57c106 SHA-256: feee6533f726cfd44e6e2acc3b618892e66dfb364f4b103c520c7dfd5fb013e0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=who+inherits+when+there+is+no+will+in+florida PDF link annotation
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/gamutut.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/ball_bearing_size_file.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/61365081949.pdfIn PDF document text
    • https://japatuxivavagax.weebly.com/uploads/1/3/0/7/130775167/levedimezorujetodo.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/bb34ff1f60c0c35.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/1883008.pdfIn PDF document text
    • http://rafidoletusamox.22web.org/60494014594.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/62788946685.pdfIn PDF document text
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/e013ce615179.pdfIn PDF document text
    • http://wuvejabamivul.iblogger.org/bitlord_free_latest_version.pdfIn PDF document text
    • https://vepovadubit.weebly.com/uploads/1/3/2/6/132696500/gesixawufajofe.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/zibilon.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/40292268963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujaxeb.rf.gd/75822493393.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_abbf0dc7db8c4fec9fa3d42299e1d8dc.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_b5deb61b7eac4aa08d768e53b233fceb.pdf?index=trueIn PDF document text
    • http://felepav.epizy.com/facial_tissue_box_template.pdfIn PDF document text
    • http://wopaxigaromuf.epizy.com/3d_models_for_archicad_free.pdfIn PDF document text
    • http://nawatelobuj.rf.gd/14657077876.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_a5caf16e973c4b5db16b7f14a99c15e3.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_9cd0d8e2505646bba24be64690fe9177.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_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 5100 bytes
SHA-256: e9e434117a1b5c059ea5efac161309159abab17ffb2f4414614607ace4be384e
font_01_sfnt_off000116b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B2 11368 bytes
SHA-256: a8b128d59aa4a2985687b0f6f1f250101f1cd0b393681d6eb0a639ef08711e42

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