Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c8aacf2f327346…

MALICIOUS

PDF

67.8 KB Created: 2021-02-15 01:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b32becc2e20e096fb13cdcdfc3760161 SHA-1: e8b30e909dac9eb524b32e6f687a242c16375eab SHA-256: 29c8aacf2f327346ee3fc91fd3642451d02103b6d761499be6e9ab1affb2cf96
194 Risk Score

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
  • 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.
  • 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://yafferge.ru/123?utm_term=ap+biology+lab+bench+12+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_602224bec5850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_601dbc451a61a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_5feb606e71e3f.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/gZUghib/56464507452.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/cificPI/remawemajoluwove.pdfIn PDF document text
    • https://cdn.sqhk.co/tebolugex/njdXjjd/lazer_spot_incorporated.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/5NFOheN/fifabazafobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465556/normal_5ff38bc5377fb.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/ghn9oaM/lazenoro.pdfIn PDF document text
    • http://copyrighthelpptteam.com/lagu_lily_cover_hanin0kaix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469351/normal_600926a612476.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/G1JjcNo/61119707250.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/runuzitexokol/69711242446.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/gokadipesezakoporupuwikir.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/admission_form_aiou_2019.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_off0000c9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B1 5700 bytes
SHA-256: 525b75f54af1de749e1f78312b8f9f66830abd30771cad05d2e58549da8b07fb
font_01_sfnt_off0000dd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD31 10964 bytes
SHA-256: 3a5dcef713708184f9eafeb12da58e1e37506f93dafea2d912b34856c65b7d1e