Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77c39d0f4a7a3dc…

MALICIOUS

PDF

74.9 KB Created: 2021-03-12 05:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53868fe7eafd52476d1f3610d51c37ca SHA-1: e234588a56fe9747dc1d2421298afc75637e0523 SHA-256: c77c39d0f4a7a3dc02f11837388c5fd5cc601127e916e60b3c78e530c34cf893
96 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, one of which is directly referenced by a heuristic as an external URI. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a manual search, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=magnavox+mc345+manual
    • http://gallery-shop.site/42932448852huyzr.pdf
    • http://alfa-quest.ru/the_classic_slave_narratives_henry_louis_gates_jrrrybl.pdf
    • http://coloradocustomelectric.com/59165490801dnq15.pdf
    • https://cdn.sqhk.co/lisutovudaf/ggPXhbS/blended_taro_bubble_tea_recipe.pdf
    • https://static.s123-cdn-static.com/uploads/4481161/normal_600033da8e2b7.pdf
    • http://strapslap.online/lagu_despacito_versi_angklung_malioboroq1fxc.pdf
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5ff1e43b75d8b.pdf
    • http://opensol.xyz/what_does_it_mean_to_be_a_sensible_personwq12t.pdf
    • https://static.s123-cdn-static.com/uploads/4384633/normal_6003278373a24.pdf
    • http://agencymedia-ig.com/27167283bg3g6.pdf
    • http://xsafak.com/legatezudumiluvodof1acn.pdf
    • https://cdn-cms.f-static.net/uploads/4387711/normal_602f3be62922b.pdf
    • https://cdn.sqhk.co/nilesatu/G9Ajiia/rum_balls_without_cocoa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c3301231-5297-4633-abde-0547eb3cb250/2007_jeep_grand_cherokee_for_sale_craigslist.pdf
    • https://uploads.strikinglycdn.com/files/bb983975-9218-4d36-af01-bc8b854fcfd9/chick_fil_a_menu_nutrition_salads.pdf
    • https://uploads.strikinglycdn.com/files/6b44af43-30fd-4c03-91d0-3ec4ec989063/87915910734.pdf
    • https://uploads.strikinglycdn.com/files/12008a18-2eeb-49c6-9fa4-a0458a09e9e6/what_is_the_goal_of_k_to_12_curriculum.pdf
    • https://s3.amazonaws.com/mejifavo/buvozasoterugom.pdf
    • https://s3.amazonaws.com/fizaxo/raxosevoxu.pdf
    • https://uploads.strikinglycdn.com/files/371a5ff3-570e-4cf0-9a25-6fc016ebcd29/lego_mindstorms_card_shuffler.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_off0000e912.bin
d24814af0b1c48ea3a689057e4d9b3c38b66fa2dfa762c18b28b1abae0032a68
pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 5356 bytes
font_01_sfnt_off0000fb65.bin
c2f44ab07212b58bfa6c483fa014fce0c5732845b524b068c4ecaf9723317ea5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 10476 bytes