Malicious PDF — malware analysis report

Static analysis result for SHA-256 e344c4819f4ae0fa…

MALICIOUS

PDF

65.8 KB Created: 2021-02-11 01:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bfdfda5d82da4633e38343a5fb0c82a4 SHA-1: 911f312fce0286426325b46d58ade69bf58cb852 SHA-256: e344c4819f4ae0fa9fe59468068ef7533125dab5274535f6c3601fe6a0772f72
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/123?utm_term=sport+clips+coupon+code PDF link annotation
    • https://cdn.sqhk.co/movumatoz/HhQgggd/32944257516.pdfIn PDF document text
    • http://kabomodom.iblogger.org/communicate_in_english_class_7_guide.pdfIn PDF document text
    • https://semototip.weebly.com/uploads/1/3/5/3/135386148/8755879.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/febuwasev.pdfIn PDF document text
    • https://kuzirorox.weebly.com/uploads/1/3/0/7/130775715/xukiwazedovuseke.pdfIn PDF document text
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/gurokise_divan_kudujedib.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/Dxgihbp/no_one_escapes_cidhna_mine_my_stuff.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/wijUYii/49548528809.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/jeCjdwJ/tokubetodutuga.pdfIn PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/8842712.pdfIn PDF document text
    • https://tufuziboserivu.weebly.com/uploads/1/3/1/6/131636644/64bed.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/xumefinawapow_zunuf.pdfIn PDF document text
    • https://fuwurobo.weebly.com/uploads/1/3/0/8/130814642/2343591.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/svkibgf/jolifeko.pdfIn PDF document text
    • http://wapajojakazewi.iblogger.org/90608544138.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/Hgchegc/zombie_survival_game.pdfIn PDF document text
    • https://kazimiposaduvab.weebly.com/uploads/1/3/1/1/131163956/jajisetur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kozifina.epizy.com/ics_200_b_answers.pdfIn PDF document text
    • http://kowisefofob.epizy.com/sodium_acetate_trihydrate_safety_data_sheet.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52D 4960 bytes
SHA-256: cc5d66a71b2d5f65f95721fd0c01a553d7fb453fc9580da5855402617771d532
font_01_sfnt_off0000d61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61A 10632 bytes
SHA-256: c3cdba23022faa0eb0fac4471b051107c27d18e29e9e9dcd61fa87d71bfefd2f

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