Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdca075827a52005…

MALICIOUS

PDF

77.9 KB Created: 2021-03-10 15:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3543869e7faf7cefa1cefbe35f74a531 SHA-1: bf5fce111e94600aeb7376e4f8a96063db462a12 SHA-256: cdca075827a52005f6d275a470f5588dc27ff112c8dd37dc383a59dc507476ce
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 an embedded URL that masquerades as a manual for a Maytag electric stove, likely to trick users into clicking it. The PDF structure also indicates potential obfuscation or duplication of objects, common in malicious PDFs.

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://golowaki.ru/wix?keyword=maytag+electric+stove+manual
    • https://cdn-cms.f-static.net/uploads/4375086/normal_6036cd8c7858c.pdf
    • http://justamorem.com/nail_salons_open_now_in_my_area30k8g.pdf
    • http://presente-top.store/maparodubotkryc2.pdf
    • https://cdn.sqhk.co/kurotevu/B1igieP/titan_quest_classes.pdf
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5fe639a3590db.pdf
    • http://naturmilans.fun/wellness_mood_tracker_happy_plannerg4on3.pdf
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5fe2134351a18.pdf
    • https://cdn.sqhk.co/werutojij/dgghehi/toxowujo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1ec36077-3107-42e0-a98e-013a31cbd327/laws_of_simplicity_summary.pdf
    • https://uploads.strikinglycdn.com/files/28ed2277-6d95-481b-8dd2-e845fccdba68/49981690395.pdf
    • https://uploads.strikinglycdn.com/files/c1504b53-ebeb-4d31-aa86-adfeb176c136/dijewat.pdf
    • https://s3.amazonaws.com/fizaxo/bbc_health_report.pdf
    • https://uploads.strikinglycdn.com/files/3882ecdb-b207-420e-8161-6a4a2bfa7ae7/sobebogaxexifobodajepobes.pdf
    • https://uploads.strikinglycdn.com/files/69970fed-558c-4262-84a1-40d1de023572/zezigozojisobowag.pdf
    • https://s3.amazonaws.com/jupudizadid/longman_business_english_dictionary_free.pdf
    • https://s3.amazonaws.com/tuzamada/vezisefumatedukadesi.pdf
    • https://uploads.strikinglycdn.com/files/70e45e9b-efbc-4eac-96e4-5c62c870ad5d/tofaruzu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e716.bin
405d7cf19e860276cf8d86414eca6499bbedfd8efc955e56b9f413b703cedfc1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 5168 bytes
font_01_sfnt_off0000f8a0.bin
f0f369ef46f15eaa59ce1108063f42c7c9b7f1db3d26c0da6c44f4a904ae670d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 10616 bytes
font_02_sfnt_off00011cb1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB1 4324 bytes