Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65de187bc9ed224…

MALICIOUS

PDF

77.0 KB Created: 2021-04-23 19:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 132f9198f28d7b1624f3083f0f3f3ad2 SHA-1: aea28f6b60f4d67847b67cdd9d27f10fcc7661e4 SHA-256: f65de187bc9ed224976541512759bedd01a06efc2dc93e6100bf1a01d197e6ff
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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.
  • 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://maypoin.ru/strik?utm_term=film+genre+including+moonlight+and+call+me+by+your+name PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367621/normal_5ff972d03a73a.pdfIn PDF document text
    • http://tryporte.xyz/antenna_and_wave_propagation_by_bakshiecl7v.pdfIn PDF document text
    • http://taptopbot.com/kofabekesofakorosonadf1wlq.pdfIn PDF document text
    • http://igcopyrightclient.com/the_maze_runner_death_cure_ending_sceneqc9x6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527164/normal_603cfd77c9d7b.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/9156971.pdfIn PDF document text
    • https://xiliperudal.weebly.com/uploads/1/3/3/9/133999468/d391d6278b35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368979/normal_5ffe9653a0d3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_ac327a9900f94993abd9c96678ecffe5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7483020f-8390-420b-af23-4e8483a0ef6b/zunovu.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/beamer_latex_animation.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/cmt_music_awards_2018_performers.pdfIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_d432d87df41c4d3387cfc33e9fc2f558.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nisoxow/webasto_heater_code_f00.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/lapalo.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/crazy_train_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114e42c5-4318-4e0b-b0e6-8d4912a5ba6f/39003723386.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 5372 bytes
SHA-256: 18f392d564bf0e3bb9604033373bb01d0183a6210f863296966537fb312c1607
font_01_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 12168 bytes
SHA-256: b191c7b63e50293153d70dfec51db3a4c7d10484f3e739ac7ddb4736ea3fc0cd

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