Malicious PDF — malware analysis report

Static analysis result for SHA-256 824104a818e6369c…

MALICIOUS

PDF

76.2 KB Created: 2021-02-13 18:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 782103e611e772e9639e4fae5c3f3c8e SHA-1: 654406e8d4549055996002846e6c1ddf67a7c0cb SHA-256: 824104a818e6369ce1c760b8cbfb4d1f76872644735249196027808c41f8b3e7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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=2007+scion+tc+manual+transmission+fluid PDF link annotation
    • http://hookup681.site/2018_calendar_template_vector_freek6yv5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366397/normal_5ff82876559ff.pdfIn PDF document text
    • https://daxixerok.weebly.com/uploads/1/3/4/0/134000062/pofapudowebaxif-somorow-puwukapizap.pdfIn PDF document text
    • http://gaydating.world/solas_free_downloadghzwt.pdfIn PDF document text
    • http://twitter-center.com/ranewuf92bfc.pdfIn PDF document text
    • http://interstart.online/2886896477665nbq.pdfIn PDF document text
    • http://coolmag.biz/14550534337vyom5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_600e639ca26a3.pdfIn PDF document text
    • https://visuwinewuj.weebly.com/uploads/1/3/1/4/131407241/9684843.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448330/normal_5fcc9a1766320.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/xakolew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477155/normal_5fc70e9aada2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_601e43ecb24cc.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/pesuwasasinos-fedatufadu-bopota.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385859/normal_5fdd71648a85a.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
    • https://s3.amazonaws.com/dumupa/rajedibadejoliz.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/53514630475.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/medical_english_textbook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F9 5192 bytes
SHA-256: 85e536f6fccc7eddadc2d0c5a3bb096b54195434170d6e6e37b4398cad2f9659
font_01_sfnt_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 10260 bytes
SHA-256: 9358289a47f811ec7569d8bca2bab304414906200bb0fe9657391db1608b9d04
font_02_sfnt_off00011583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11583 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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