Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bc15fc77ef55a1…

MALICIOUS

PDF

66.3 KB Created: 2021-01-11 17:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9b1e42f17833f3a7b760b820165c50e2 SHA-1: 710ec8ff3e7b4e8fce945f647f44ba03f29b19c3 SHA-256: 67bc15fc77ef55a124c5a3cfa5a9c1400bd385a3e30d63e6e393fa4333b45eaa
252 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to malicious infrastructure. The presence of a 'download button' lure further supports a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/aws?utm_term=rjz+bye+bye+song In PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/zenagosijiziguw_zewotuziga_vesozavezebeli_lupatovogez.pdfIn PDF document text
    • https://mepuralomelefaz.weebly.com/uploads/1/3/4/4/134494325/10a4d7665d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fd6c6db5016b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_5fafa4c7dd80c.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/bipopedanitol.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/bWniaxz/59326318525.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/hdjd7if/xaninix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379473/normal_5fcf585f2471a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_5fa224abd70e6.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/jorixajo.pdfIn PDF document text
    • https://rusepokobedog.weebly.com/uploads/1/3/4/3/134366979/divududi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/harder_better_faster_stronger_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/rise_of_the_robots_martin_ford.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFA 3120 bytes
SHA-256: 750d1396ea0bf5fbbfb1efa7800930e25a2e400cebbc542b316d66b1e2c172b3
font_01_sfnt_off0000c92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92F 4892 bytes
SHA-256: 345a0749cfb3fa33328d66d10d855293fa5a8c02af9b87c2d44d1bfe2cdf4447
font_02_sfnt_off0000da08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA08 10068 bytes
SHA-256: ab6425bd343bc82d36289647e490fc889d1aa9b3464e93c46df1aad86a1e2962

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