Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c6d38fce2b4a81…

MALICIOUS

PDF

93.9 KB Created: 2021-05-08 14:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7dab728df0d01c4e6feffef9cbadcf85 SHA-1: bea72ea6e67527fc7ba1af82e6df71484ea20660 SHA-256: 12c6d38fce2b4a8149f301871ac3df7444184cc9dc1f655dea568f187224264a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=what+is+a+good+amc+8+score PDF link annotation
    • https://cdn.sqhk.co/junigofulum/hgjclq5/disco_zoo_patterns_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_60326536d23ef.pdfIn PDF document text
    • http://xrootunited.com/128285369348b2un.pdfIn PDF document text
    • http://ewop.space/868826447848jnte.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/minijenapiwipakarewup7v7p.pdfIn PDF document text
    • http://xteenware.online/fuvijumadowavuti8oq5w.pdfIn PDF document text
    • http://mamontov-net.cc/concepto_de_amilasaj6ine.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/frigLhe/56775046665.pdfIn PDF document text
    • https://regenapewafixun.weebly.com/uploads/1/3/4/3/134364718/104713a53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484609/normal_6008aacdb4be0.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/fmBQhc2/loopty_loop_race.pdfIn PDF document text
    • https://koligopore.weebly.com/uploads/1/3/4/6/134605833/4614713c1099.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_603fe6bb810e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d5fb96-5313-4455-a900-43b652b234ec/roland_percussion_sound_module_td-3_v-drums.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef8e25f-e60d-49c0-a70b-c691752b95ae/7412594292.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/antivirus_free_2019_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b25a9d7-a4cb-4d91-88e1-cf81250c8af4/how_to_operate_haier_washing_machine_fully_automatic.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/material_safety_data_sheet_sodium_chloride_msds.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/angular_material_datepicker_format_value.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_off00012f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1A 5528 bytes
SHA-256: 64829aca67a0eb1ff4cd596f7809bb9d97b6e66a64ac59a76bde82c8004e184d
font_01_sfnt_off000141c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C5 11608 bytes
SHA-256: fb1796773bd3557cac34b5474f98ebc4e26510614caec5cbf940138f86039876

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