Malicious PDF — malware analysis report

Static analysis result for SHA-256 02aca32be29f0003…

MALICIOUS

PDF

78.9 KB Created: 2021-02-28 23:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f06be4570f7509ffd7c7ee65be589609 SHA-1: 735ec305190754f34ce9876887e7dc4c1136f146 SHA-256: 02aca32be29f00030ffc354bebae3571a2a7e20ae7d72e4d41eca9408c8b126a
214 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure. The presence of embedded links suggests an attempt to redirect users to potentially malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=delta+monitor+1700+series+shower+head In PDF document text
    • https://static.s123-cdn-static.com/uploads/4501810/normal_5fc72601510d0.pdfIn PDF document text
    • https://cdn.sqhk.co/reposivekow/y0igf2p/fruit_cutter_game_download_free.pdfIn PDF document text
    • https://geripefuni.weebly.com/uploads/1/3/2/7/132740274/351dd.pdfIn PDF document text
    • https://gabusuve.weebly.com/uploads/1/3/5/2/135297202/599164.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/jniaBhh/5045330670.pdfIn PDF document text
    • https://cdn.sqhk.co/wifenepomojo/WZifijr/does_target_have_face_masks_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/iqghLLn/3413616398.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/mXcAhi7/62606334531.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/gjPEig0/download_souzasim_drag_race_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403259/normal_6009afc24459e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600d2833c1e41.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/hhJjiqG/39865852066.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/KjjsSO1/turbo_car_racing_3d_hack_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/mewedenemez/6aIMttx/41221897928.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/bDIajd0/53067254445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_602b5c56c7ee5.pdfIn PDF document text
    • https://feverawujebuv.weebly.com/uploads/1/3/5/3/135314909/bagomikoranoreso.pdfIn PDF document text
    • https://cdn.sqhk.co/pidenali/phfZgge/amazing_ka-_partner_app.pdfIn PDF document text
    • https://diboboxu.weebly.com/uploads/1/3/4/3/134330346/siguju.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/4EJiehe/lubinebanejeposaruzu.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/iiaVnjb/97997280112.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_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 5428 bytes
SHA-256: e2c3c6d8657e324e4e7cdd437f67bbc3890867af740487a6d185ac5dd443a642
font_01_sfnt_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 12460 bytes
SHA-256: 883ca48b1294c51da1f55cc01e672272acbcee618971b3e32baa4cdbfd4ec284

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