Malicious PDF — malware analysis report

Static analysis result for SHA-256 f852b5ba8f468f1d…

MALICIOUS

PDF

90.6 KB Created: 2021-03-17 01:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a963bf7d5aae757d4c6b924fd637d026 SHA-1: bc1765bbbb85f5eeab2e422a726573fcf020fa4b SHA-256: f852b5ba8f468f1dc45137a2a5a05347be418b8110e9a83faaa46d5f2292d9af
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for an image lure linking to an SEO redirector, indicating a phishing or malware distribution attempt. The embedded URL 'https://zajinet.ru/wix?keyword=major+graham+mansion+story' is the primary indicator of compromise. While no scripts were explicitly extracted, the PDF structure and the nature of the redirector suggest potential for further malicious activity, such as JavaScript execution or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://zajinet.ru/wix?keyword=major+graham+mansion+story PDF link annotation
    • https://cdn.sqhk.co/sisamide/eotjcwR/24530095290.pdfIn PDF document text
    • https://lusizemanu.weebly.com/uploads/1/3/4/1/134108609/5899071.pdfIn PDF document text
    • http://teatr-art.com/a_theory_of_human_motivationywkd8.pdfIn PDF document text
    • http://vinorama.fun/zoburedafesomijimodibgx2rh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_60355d0086d79.pdfIn PDF document text
    • http://tipografiyav.moscow/viwagibanaw8hkr.pdfIn PDF document text
    • https://cdn.sqhk.co/zubafena/gRqKsid/fozinidikifavetemuv.pdfIn PDF document text
    • https://fizijoju.weebly.com/uploads/1/3/0/8/130814030/lenoduzivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_604a791019196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476590/normal_6040ab680d71f.pdfIn PDF document text
    • https://metulomoponi.weebly.com/uploads/1/3/4/4/134498565/8aa30a69280fab8.pdfIn PDF document text
    • https://sitimewodojex.weebly.com/uploads/1/3/1/8/131856527/7670636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_6034fd2374dde.pdfIn PDF document text
    • https://cdn.sqhk.co/xamozafi/cC8LMl4/nakazokisigotan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5fec057c755e1.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/3FUbhht/fake_caller_id_text.pdfIn PDF document text
    • http://kapusta.pro/49946390510u154b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468531/normal_60210ae8ca127.pdfIn PDF document text
    • http://semengergel.ru/79977167588kiep1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_6035fd2b4333e.pdfIn PDF document text
    • https://cdn.sqhk.co/widagawinud/bijibHC/lijuraxuvaduketugad.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/gozilum/fate_core_rulebook.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/28508530880.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/what_are_the_generic_structure_of_historical_recount_text.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/1886402727.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12539 5252 bytes
SHA-256: 70b084c1d5b20c8ac7a0817cac8105a77fc60e02471ab8e9c2be472977bb7f0a
font_01_sfnt_off00013705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13705 11204 bytes
SHA-256: ebd0cc431802a070b7ee8e4ae2b246b72ed3ccc4c392eb7ea8ae12eee42d4624

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