Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f00cfa6b145cfb…

MALICIOUS

PDF

80.2 KB Created: 2021-01-01 08:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c848a3f468027a9eaf8cd491945fcc16 SHA-1: 9bf8b69cb7755bdb8e0625f8f94c4b01fcefe472 SHA-256: 19f00cfa6b145cfb0f1426605e6e4a5da10ead72a160e8774b49930c9c904edf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs and the nature of the link farm point towards a tactic of luring users to potentially compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=3dlut+mobile+app PDF link annotation
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/resok.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/Y6xnFGi/original_pong_video_game_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_5f8cf89bf37c2.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/2160481.pdfIn PDF document text
    • https://tufasibapot.weebly.com/uploads/1/3/4/7/134716176/nunupejewezezub-gujetilozitanom-sirakizegiz.pdfIn PDF document text
    • https://wuwebiwurumebil.weebly.com/uploads/1/3/1/1/131164488/fexiv-tokufiziz-lesikarexabatil.pdfIn PDF document text
    • https://texatejoluneb.weebly.com/uploads/1/3/5/3/135318687/renedegarobos.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/Bhicgfo/best_superhero_movies_on_netflix.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/limekawavuv-fukif.pdfIn PDF document text
    • https://mufixedak.weebly.com/uploads/1/3/4/6/134602267/1a41773d8f3ff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_5fd3136ea1b12.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/jidimut.pdfIn PDF document text
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/rubiwojab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 4328 bytes
SHA-256: 04f594de5b035985aa63e6a326225cc2ef74855af985fdd4ff61586d3efbf2bf
font_01_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 4816 bytes
SHA-256: d4fb7e715d9ff220b9ad036c490abde34aeeffba38237a782cfe5725e10b425f
font_02_sfnt_off00010177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10177 10208 bytes
SHA-256: 1a1d3a6a92b6d329b0b4fec0a605aaa94ef491cf2fe6ea260c2854e96f205ee0
font_03_sfnt_off0001248a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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