Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6b2687a7326d10…

MALICIOUS

PDF

68.5 KB Created: 2021-02-14 15:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 690ed311c858d5da98a3150d397aeea3 SHA-1: 68ad9b50f92235f547fb8d85931969d990aa4827 SHA-256: 2f6b2687a7326d1001111e06d0f45fdf50a5d1c6d3a20da4668a4c2a07fbc994
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external URIs pointing to various domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites, possibly as part of an SEO manipulation scheme.

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/wix?keyword=strike+force+heroes+2 PDF link annotation
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/gawefigusa.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/zipazurebulugif.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/gijtieJ/tops_to_wear_under_jumpsuits.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/hxkjggg/airfighters_pro_for_android_free_download.pdfIn PDF document text
    • https://duxetaxegijojem.weebly.com/uploads/1/3/4/8/134870405/molezudulavu.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/wljjJsu/vampires_wife_cape_h_m.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/ezzinZ3/79611498032.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/Aji1iae/11833665117.pdfIn PDF document text
    • http://tewazezila.66ghz.com/halloween_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/81f0c1dcfab59.pdfIn PDF document text
    • http://fosufupivufup.66ghz.com/pikubebawaselijobaz.pdfIn PDF document text
    • https://lixawedubofalat.weebly.com/uploads/1/3/1/4/131407760/7956845.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/3252423.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/ikhihjK/1730544114.pdfIn PDF document text
    • https://dotozirijekuzo.weebly.com/uploads/1/3/4/3/134315872/c91bc4d3f237e24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gizogebinide.rf.gd/zifudibi.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/wallpaper_hd_free_for_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/manualidades_con_cubos_de_papel_higinico.pdfIn PDF document text
    • http://lemizirimafon.epizy.com/ust_admission_guide.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_off0000d01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01B 5024 bytes
SHA-256: 7d4aedce30eb54da2eb3d38b614178335d8066d74d7d1f43d79a23d927d6ca87
font_01_sfnt_off0000e13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 10528 bytes
SHA-256: 64363116107ee69dea725ded11687f2559a5eeeecad7cb76365449f4e33b96e0

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