Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7df4cbd6b32bf24…

MALICIOUS

PDF

70.2 KB Created: 2021-01-24 05:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 11f7777e8b0cc17790bb8bb2f283d320 SHA-1: bd4013e3c5f36d316962ebcaceb3d6cdac8b6a54 SHA-256: e7df4cbd6b32bf24dea763f8b507f55ca8ae4290a14e0a20a55e370aa406d5d9
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' pointing to external PDFs. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful sites, aligning with phishing or malware distribution tactics.

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 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://baarspo.ru/123?utm_term=adidas+busenitz+tongue PDF link annotation
    • https://nidikibadut.weebly.com/uploads/1/3/1/4/131453007/7267f049b7262b.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/LhiHjhh/cruise._com_online_jobs.pdfIn PDF document text
    • https://site-1234661.mozfiles.com/files/1234661/dusk_till_dawn_tamil_dubbed_movie.pdfIn PDF document text
    • https://site-1198047.mozfiles.com/files/1198047/narrator_voice_pro_apk_mod.pdfIn PDF document text
    • https://site-1180155.mozfiles.com/files/1180155/suzoterufas.pdfIn PDF document text
    • https://rinavupitaf.weebly.com/uploads/1/3/1/1/131164375/f00ce5aad.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/mepegefoje.pdfIn PDF document text
    • https://cdn.sqhk.co/redexisa/gggjX8J/theater_in_crystal_lake_illinois.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/kazet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/xatugebuxaxawupaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/harvest_moon_a_wonderful_life_lumina_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/65040171715.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/happy_birthday_cake_images_hd_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/adc_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/50085714267.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/62086546058.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/actalis_file_protector_free.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_off0000d6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D3 5044 bytes
SHA-256: 756431525b1173b2c3f292d3e7379e6fca2b6a20b13b29ab1e366db55c40ec34
font_01_sfnt_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 10352 bytes
SHA-256: b1cbe17e4ce339cfd910ed8cffb2cbd1985bea8e69744b9695cbcffdf32bbd0f

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