Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69ff7940fc26b70…

MALICIOUS

PDF

83.2 KB Created: 2021-03-31 05:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8d66cb2b8470acec4869dd662e47a3aa SHA-1: 524e8a3845efea762c293b860faa3453dcddd4ce SHA-256: c69ff7940fc26b70e2e7394a32c33ed0df2c6381de5ccecde60793a1dc56b60f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://nipisod.ru/wix?keyword=st+james+lutheran+church+gettysburg+pa+history PDF link annotation
    • https://safapovajedetux.weebly.com/uploads/1/3/4/6/134642125/dulajej-bofaw.pdfIn PDF document text
    • http://hook-up.fun/436089240475aptk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_5fd94494c3906.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/FjdrijG/indoor_outdoor_paintball_near_me.pdfIn PDF document text
    • https://kubududowu.weebly.com/uploads/1/3/5/3/135349078/lobexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_6047db939afb1.pdfIn PDF document text
    • https://cdn.sqhk.co/lilajibusizu/jghchbU/37606307505.pdfIn PDF document text
    • https://dusonibegoxat.weebly.com/uploads/1/3/1/3/131380688/mutalof.pdfIn PDF document text
    • http://wide-mean.top/78514561047sdgtd.pdfIn PDF document text
    • http://myirn.icu/latibex28xyp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404725/normal_5fcdad8edb69b.pdfIn PDF document text
    • http://graatorama.space/problemas_matematicos_para_nios_4_gradoejo9s.pdfIn PDF document text
    • https://rupedotumimeto.weebly.com/uploads/1/3/1/4/131482941/temobefadopumebowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_6063c9db1cbf9.pdfIn PDF document text
    • http://priz24.site/how_do_you_get_a_royal_crown_acnhv0dan.pdfIn PDF document text
    • http://segway-wheelchair.ru/la_divina_comedia_nombre_en_ingles5z4zu.pdfIn PDF document text
    • http://doordash.link/matelas_simmons_hotelys_suite_612nb315.pdfIn PDF document text
    • http://es50off.pro/64682473603wrg72.pdfIn PDF document text
    • https://bekozowa.weebly.com/uploads/1/3/4/7/134713297/8286286.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5feffeed17958.pdfIn PDF document text
    • http://zavodtriumf.com/cva_wolf_muzzleloader_loadsdn47g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_9ded0d9335d643999f6a48fbb868e4ec.pdf?index=trueIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_1207cbe27af24d7cbb7675a58256bc74.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_cd9b47b6683e464197bcd92222dcaf98.pdf?index=trueIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_34b08e7d942c4f5f8596c180f5d81c31.pdf?index=trueIn 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_off000104c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 5768 bytes
SHA-256: abae5dca13eb9ff806031f6138c0417f3a6caea895866698f84b8939e1b305c2
font_01_sfnt_off0001184a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184A 11088 bytes
SHA-256: 1fd4db629bb339d5cc72ab167e981aecd56e02ee9c8c4f7b0fc23a8cd339f815