Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b684e68162138d…

MALICIOUS

PDF

75.6 KB Created: 2021-04-06 18:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eda3f555ac38bdf7d07db9f1aaf2d41 SHA-1: a364c76a148e246a2beba12cbbf11cc09351630d SHA-256: 15b684e68162138d455a5af774fc05c3a6df2275079b8193e52788040f03a9ac
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous external links, suggesting an attempt to direct users to malicious websites. The ML classifier and ClamAV detection further support its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://gimoguvi.ru/award?keyword=java+buzzwords+pdf
    • https://cdn.sqhk.co/sexuzoropa/ijbgjii/tiny_space_program_mod_apk_revdl.pdf
    • http://hookup756.fun/cyberpower_cp1500pfclcd_f03_errore13e3.pdf
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/03442eeaa37cba.pdf
    • https://cdn.sqhk.co/xekawiba/iaUNMDr/teachers_federal_credit_union_el_paso_osborne.pdf
    • https://novadoja.weebly.com/uploads/1/3/4/8/134873208/musazivuwijatixideje.pdf
    • http://lnstagramverifiedbadgeshelpcenters.net/mekuvakafbjtoe.pdf
    • https://cdn.sqhk.co/sirepajaku/hhNvjf3/63309788950.pdf
    • http://vezerfa.xyz/greek_and_latin_roots_meaning_of_loci02v7.pdf
    • http://familyit.info/hlookup_example_in_excelhnm8l.pdf
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/fijimorifan.pdf
    • https://cdn.sqhk.co/kabevapixox/a9kD3gg/big_windows_living_room.pdf
    • https://cdn.sqhk.co/taxuvoguraji/IsRWgdG/how_to_play_flip_jump_stack.pdf
    • https://dapekedes.weebly.com/uploads/1/3/4/6/134643928/nunew_lodiginatusus_muwakamoful.pdf
    • https://cdn.sqhk.co/konajera/g5iaDhj/moto_mod_camera_360.pdf
    • https://jexisaguratoka.weebly.com/uploads/1/3/1/4/131409442/nepedizejobikodeja.pdf
    • https://cdn-cms.f-static.net/uploads/4468551/normal_5fe80234afcc0.pdf
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/2250832.pdf
    • https://cdn.sqhk.co/datagemop/QXOHeic/gamebanjo_mod_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5ff667daa6803.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000eb95.bin
1d24f871758e0c68da037d763e90a7c1b5a5f9453f70ee8a6b7e78c52f9bd0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 5336 bytes
font_01_sfnt_off0000fde6.bin
f79f3de09b986cb8ec21c96f856fca92cdb27c522d7c36a00a74ce453a211279		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE6 10576 bytes

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