Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6969557ac5f343…

MALICIOUS

PDF

93.1 KB Created: 2021-03-29 21:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55b0f737193d37c90e779830c9df681d SHA-1: 9f4f89fe56b2d3654387d0b7c0549cc2de0edeee SHA-256: df6969557ac5f343131a120a54f9eadf5b51fd18402e77323aa3672ee9699550
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to an 'audiometer test form', aligning with phishing tactics.

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://xajibur.ru/123?utm_term=audiometer+test+form
    • http://xedeporib.medianewsonline.com/flash_player_chrome_support_ending.pdf
    • https://cdn.sqhk.co/zikufojigox/ijigDhg/xerumiwe.pdf
    • https://cdn.sqhk.co/fuvivemu/phjf9je/26479649895.pdf
    • http://phtech.site/how_many_calories_to_lose_weight_chartgtktx.pdf
    • http://newoxoxi.mywebcommunity.org/janojijupinuxowonow.pdf
    • http://nabavawuzafurur.mygamesonline.org/ab_blood_type_diet_meal_plan.pdf
    • https://cdn.sqhk.co/kunimanujage/boR30yR/john_gba_lite_download_ios.pdf
    • http://myfavoritesun.xyz/zofapovakax5dm0x.pdf
    • http://vobalemujumojak.mywebcommunity.org/how_to_take_photography_classes_online.pdf
    • http://pipavinekiga.mywebcommunity.org/xexilon.pdf
    • http://nadipewin.mywebcommunity.org/types_of_congestive_heart_failure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zarejumologile.epizy.com/xeselumoziwizila.pdf
    • https://uploads.strikinglycdn.com/files/660478de-201b-49c4-b4d4-07a9d0089fe7/sony_dav_dz170_push_power_protector.pdf
    • https://uploads.strikinglycdn.com/files/357c53f7-ed1a-4352-804b-12731436f0b8/wudufixut.pdf
    • https://uploads.strikinglycdn.com/files/120a6e4b-7cc9-45e4-92ae-bf201f853bd9/59153430209.pdf
    • https://uploads.strikinglycdn.com/files/d16133b3-dece-4814-8b69-11410e65906c/schwinn_exercise_bikes_walmart.pdf
    • https://uploads.strikinglycdn.com/files/20b1b28b-6445-41be-8cd6-6a8702af24b5/why_is_my_dyson_pulsing_on_max.pdf
    • http://kezadovimitaw.rf.gd/gubuvevamuxa.pdf
    • http://retasanege.rf.gd/metro_map_paris_download.pdf
    • http://jisodusajagijip.rf.gd/chemistry_of_actinides_and_lanthanides.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_off00012fc5.bin
f495f3c7cbea3f05aff661c313423023f99fac645ae62b60b19d0fa04c683aeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC5 4800 bytes
font_01_sfnt_off00014000.bin
138fee3fa71d97b876412db5c00ebc9d461a28dc875a57e3007c34a6d1c2d5aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x14000 11796 bytes