Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ca9bc898433a32…

MALICIOUS

PDF

74.2 KB Created: 2021-02-20 21:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39f56d23117aa1d57f3cfe93bdbd8666 SHA-1: 74299cf44a04f7042075cf3fe816bde26656c455 SHA-256: 62ca9bc898433a32c85b7a5cb9e8c84afe0d09e0f7c81a03c81632b333439ed0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, one of which is directly related to the document's apparent lure of 'starfish dissection lab answers'. The presence of embedded URLs suggests the document is designed to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/wix?keyword=starfish+dissection+lab+answers
    • https://cdn.sqhk.co/busanurutar/7icifFv/rezozarovatod.pdf
    • https://cdn.sqhk.co/kagurase/Uic1jdl/the_farmer_s_dog_food_near_me.pdf
    • https://cdn.sqhk.co/tinulafi/uZzjj0f/51730183103.pdf
    • https://cdn.sqhk.co/zirimikuj/6zjidMH/14179736563.pdf
    • https://static.s123-cdn-static.com/uploads/4376870/normal_5fe0dac0099d6.pdf
    • http://atomlinux.com/fobabutes6eh8.pdf
    • http://fastpysystem.online/photo_studio_photo_video1eabw.pdf
    • http://lavka-karamel.ru/xurinakovikit4k2z4.pdf
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fd3b434277b3.pdf
    • https://cdn.sqhk.co/pefevepufi/jejggjk/ralphs_pharmacy_sherman_way_canoga_park_ca.pdf
    • https://cdn.sqhk.co/gepeduvo/7MDhiUg/rosagepeje.pdf
    • https://cdn.sqhk.co/texonatuzi/jj19Ngd/98540125666.pdf
    • https://cdn.sqhk.co/sevafeluba/idjjKgd/crusaders_of_light_pc_gameplay.pdf
    • https://cdn.sqhk.co/wufevinek/FgyidXN/dalifibiwilozi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tojazudibumogab/26077816827.pdf
    • https://s3.amazonaws.com/savifin/change_adt_alarm_code_safewatch_pro_3000.pdf
    • https://s3.amazonaws.com/kigavanus/aircraft_weight_balance_form.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_off0000e62d.bin
49e80099b4dd16d0d51c1c52f1fa42c2f1ad8c1a8a030c22827d1d6699ee43a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE62D 5444 bytes
font_01_sfnt_off0000f8bb.bin
abc532a02d485a5e7420ec9fa619b0f83034e23168ed5eb71dcad95a3dbfdbc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 10148 bytes

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