Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3be387f34fec8c…

MALICIOUS

PDF

81.0 KB Created: 2021-03-30 00:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0633d0c7783a4851e56420141fe981d8 SHA-1: 82597df3ab570c9fe9ff48e1022f6cf55095978c SHA-256: bd3be387f34fec8c5fca35b4d5a9156b37e8d438765e3b2e57a585bdbafe4659
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO manipulation or phishing, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=radicalism+in+indonesia+pdf
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/504901.pdf
    • https://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/pobupezumon_bofopukixosov_wikanofonorilu_xegarut.pdf
    • http://fruit-italy.space/73624232496jlxun.pdf
    • https://lufavipipoj.weebly.com/uploads/1/3/4/5/134580953/c4abcb1d613c6e.pdf
    • https://kabigupux.weebly.com/uploads/1/3/4/4/134442156/jefiwibe.pdf
    • https://zujavezamuni.weebly.com/uploads/1/3/0/9/130969293/1067406.pdf
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/tuvej.pdf
    • http://keepqifi.site/kenmore_116_parts_diagramywycc.pdf
    • http://firstflirts.site/arthur_c_clarke_rama_22mj4f.pdf
    • https://rejileju.weebly.com/uploads/1/3/4/3/134335231/watosarejebiju.pdf
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/wewawutopulu_xemorewofevuxoj.pdf
    • http://ttttrrrr.space/thunder_stock_cars_26gmyz.pdf
    • http://yachts-4-sale.com/ratamerejupijolg0kva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/davawina/best_rooting_app_for_android_7._0.pdf
    • https://s3.amazonaws.com/takurugilij/sleep_as_android_alternative_reddit.pdf
    • https://s3.amazonaws.com/donake/88356267690.pdf
    • https://s3.amazonaws.com/pewibim/76243984574.pdf
    • https://uploads.strikinglycdn.com/files/878ea324-9869-426e-9a8e-82fca06fd716/three_felonies_a_day_summary.pdf
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_709b733450084e77bfce7830664df8e1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/50eb1766-e3b4-4039-b3a8-5914864d6f06/naduw.pdf
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_aa946042cff34972bcd4dd146a924f7a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e9b5f38c-c88c-447f-94fc-c06b74a87ca6/polo_ralph_lauren_coupon_in_store.pdf
    • https://f2f8a3c9-3ea7-4a25-b7e2-3e2749f32899.filesusr.com/ugd/f0e51d_889d1edf006b41fdbc5f07b88620a9d2.pdf?index=true
    • https://s3.amazonaws.com/xotomisen/jevejevewezen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010141.bin
c43202e164ffd295d2d9afd6fa0ab6c1ba029fd9a5a976b44253937e8c5107ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10141 5212 bytes
font_01_sfnt_off000112f8.bin
302b1e6c057a0bdd1800bc2ccdba1a0b68cf00fa366333aa1e40c09afe19f7be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 10624 bytes

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