Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ea99674904f77b…

MALICIOUS

PDF

40.8 KB Created: 2020-11-04 04:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c598433fc7e4893c35d32789900379ba SHA-1: 2a4e16104120e88f29251c0ebeb4af14ce4f333e SHA-256: 72ea99674904f77b5026674154af061c8551c5d6a179fc9e0a7b594b52eef6a6
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to "puff bar verification" and the malicious URL. This suggests a phishing or credential harvesting attempt, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://ggtraff.ru/strik?keyword=puff+bar+verification In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f9434ca31727.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/830c43e4-7d09-4be6-9154-51be3fa444b3/rotmg_price_guide_utility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e9f33c-b4cc-457f-9ba9-cc8215121a86/69707440345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b631241-fac0-4e73-87cb-93027003bbdd/kasukogafajizeriwuj.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/calorimetry_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e931b33-c1a2-48d2-a005-75dfb4002038/vixogef.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/54798008295.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/brown_girl_dreaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2a74fa-cecd-4e2f-9f0b-2b3ce3e93c8f/malayala_manorama_year_book_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9375910-5f91-4df7-92e0-7ed263e36694/63677619156.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/83332229122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5018e6-9638-4dcb-a659-e23fc48b08f4/jagevitejes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17198b1-a3f0-4ef6-bbc4-5a5a9398cb2f/vogiwofazuxoxirokedivep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf775f4-40e8-49aa-8556-b80622a8ecb9/diseo_de_primers_manualmente.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/68029659950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9717f95-62cd-4c73-90c1-c03f3d3d8e55/guvovepobinikovus.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 4

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_off00006140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6140 4868 bytes
SHA-256: 75dacb87bf26257a9258dcb3565961bfab0ee89bac745c94acb9f3935b8a4dc2
font_01_sfnt_off000071e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E7 10720 bytes
SHA-256: 49c987ba0dfbab1772d2556dd1506215d2361e53aed14e692081187fbc22eb5e

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