Malicious PDF — malware analysis report

Static analysis result for SHA-256 1908ce671beffa94…

MALICIOUS

PDF

76.6 KB Created: 2021-02-23 21:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fa76cec729622b5a257408a9a4a177f8 SHA-1: 3342ff23fbee99f666420995a0c0907f3bda0cad SHA-256: 1908ce671beffa94d74169aae15e2de9850623eb961142bb0d26c8ef105d35fd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious 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://jacksth.ru/strik?utm_term=what+is+the+main+argument+in+the+death+of+the+author PDF link annotation
    • https://zabagogaj.weebly.com/uploads/1/3/5/3/135313674/wefolovan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497695/normal_5fcc04ddd23a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fcd422a28d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_602661726380e.pdfIn PDF document text
    • https://gezivotad.weebly.com/uploads/1/3/5/9/135963035/zozake.pdfIn PDF document text
    • http://roman-holidays.shop/formal_affirmative_and_negative_commands_in_spanishh0la6.pdfIn PDF document text
    • http://smcjd.com/sugezepovi6j9t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fe87b2773fb7.pdfIn PDF document text
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/9417015.pdfIn PDF document text
    • http://trysalon.xyz/78731906801g9lu5.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/fd02f25bea705c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498348/normal_5fdca08111884.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/natinaxifogusujunumagaxotfvd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd377c133190.pdfIn PDF document text
    • http://sberbank.services/chandelier_3ds_max_free5a7sx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_6014cdd9c72b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 5304 bytes
SHA-256: 8e209514bbe8647349fe75b1aa9da30e4c148be7bc2d7f2b72f240a5d0cb6478
font_01_sfnt_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 10752 bytes
SHA-256: f5904a19da35856f8e822dfe9deb7dd2bd14353a5f0bc2fa2f37ee12e96aafa7

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