Malicious PDF — malware analysis report

Static analysis result for SHA-256 873522eef0a5183d…

MALICIOUS

PDF

104.3 KB Created: 2021-02-18 13:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f4dcd1cebe7364d848e1b16450c3dc04 SHA-1: 713724c9b3824c6e1ff8643f5e98f5be77098831 SHA-256: 873522eef0a5183de5b5d290dde6b4b6a6a71182628ad842b0e977fdd4201f7c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a link farm. Several heuristics indicate this is a SEO manipulation tactic or a distribution point for malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=full+metal+jacket+private+pyle+speech PDF link annotation
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/pugarefajobodid_mulamefedul_femapixe.pdfIn PDF document text
    • http://pumba.fun/download_slumdog_millionaire_sub_indoxinjh.pdfIn PDF document text
    • https://zozajiditufex.weebly.com/uploads/1/3/5/3/135309939/lugadinozowasumi.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/eQhggev/tabupuxovujiperuruzel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_600f7ce8bcb23.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/gelL6ic/human_fall_flat_christmas_achievement_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/fDkhjjg/77678881915.pdfIn PDF document text
    • http://nazhivy.net/calendarul_ortodox_pe_stil_vechiwjsrg.pdfIn PDF document text
    • https://cdn.sqhk.co/desixurate/hhevLij/audio_pro_addon_t14_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462350/normal_5fd3a2268f6c5.pdfIn PDF document text
    • http://shop-profildoors.ru/manofateporozosesetatsm6e.pdfIn PDF document text
    • https://zimizediregewoj.weebly.com/uploads/1/3/4/0/134040679/0d1d57ebf39.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/d61443fe7300df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_602d084164a8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5ff3874fa797d.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/rofaravaleromo-sikez.pdfIn PDF document text
    • https://teleroxekafi.weebly.com/uploads/1/3/5/3/135321942/6778639.pdfIn PDF document text
    • https://cdn.sqhk.co/peposusuwi/eL0qrEL/discount_code_for_amazon_electronics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000158b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B9 5432 bytes
SHA-256: e2813ef0e0aae1557cc42809565e9ba8ba756b4d2fd3961a6f2d163cab404f40
font_01_sfnt_off00016b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B16 11852 bytes
SHA-256: ba3e480487eb32c6a53223076c9c82ad7bc60f515e26d8f8e2c40578d209a28f

Open this report in the interactive analyzer, or submit your own file for analysis.