Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecfe54c319dd54a…

MALICIOUS

PDF

74.5 KB Created: 2021-02-17 06:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0074c0e301b9e31765954db83b96ff01 SHA-1: f834b9c5bc781aebbe0faca30b8d641b41ee5272 SHA-256: 2ecfe54c319dd54aa0673a77b1f2d2bd1e638baf4cf4a5f7f3373d53c9e27a33
126 Risk Score

Malware Insights

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

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=dash+diet+plan+for+vegetarian+indian PDF link annotation
    • https://cdn.sqhk.co/ligumorik/8gcx5FF/53253984426.pdfIn PDF document text
    • http://joblanc.xyz/honorarium_payment_guidelines_south_africaq6kjk.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/jpcQ0ge/color_fill_gun_with_nail_polish.pdfIn PDF document text
    • http://kengoru.space/boxibolesudusgxhu.pdfIn PDF document text
    • http://my-favshopf.online/japadugofezavuwawavogmeos.pdfIn PDF document text
    • http://herss.space/radio_shack_md-1700_keyboard_power_supplygbi1g.pdfIn PDF document text
    • http://believes.space/rojuriz6sztx.pdfIn PDF document text
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/vekikovovovobe_ginetez.pdfIn PDF document text
    • http://betixisu.22web.org/billi_boli_meow_song_free.pdfIn PDF document text
    • http://ayazshabutdinov.club/lagu_adlani_rambe_seberkas_sinar_wapkafy6j1.pdfIn PDF document text
    • http://pannochki-art.com/fenenewekezigam59yh4.pdfIn PDF document text
    • http://reduslimitaly.website/65942791437q2lr5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litegizixusiw.rf.gd/wefosiz.pdfIn PDF document text
    • http://xokesuluz.epizy.com/rokasexuraratapupuwe.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_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 5364 bytes
SHA-256: 44bfaf4132469671c440b6a9acc9975d0e2fab215859e80eab97d94969276384
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 10916 bytes
SHA-256: 4319ad7a8b3afab2b0e82a49ffb810c07769a5321da9c60c593d3d8d36aa4033

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