Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09013f3d1f3bab4…

MALICIOUS

PDF

65.5 KB Created: 2021-04-18 07:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aca19af47db7779cfff97793dba7f7ca SHA-1: 04e30270c57d93d109e9e4c552affa6fd2a55aec SHA-256: b09013f3d1f3bab4ed9bae36348bc92863692c34c3aeaf7c5b0fb81de84bbea6
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the PDF structure and embedded URLs point towards a common tactic of redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8429

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pelibifir.ru/strik?utm_term=common+interview+questions+for+health+care+assistant
    • https://jaragamonobuwuf.weebly.com/uploads/1/3/5/3/135346236/7775702.pdf
    • http://nenegifivujaxu.mypressonline.com/rachmaninoff_piano_concerto_2_piano_solo.pdf
    • http://nebuxopav.mypressonline.com/sojumobuxikunodozuvewidut.pdf
    • https://cdn.sqhk.co/linotepibubi/idjbBhd/creative_arts_therapy_jobs_near_me.pdf
    • http://kigumelez.medianewsonline.com/flowers_for_algernon_complete.pdf
    • http://farunoraxukiz.getenjoyment.net/63175200293.pdf
    • https://cdn.sqhk.co/kamavedes/gjdiet3/five_ten_mountain_bike_freerider_contact_shoes.pdf
    • https://cdn.sqhk.co/xorudonox/jdbTieP/scary_granny_mods_horror_house_escape_apk.pdf
    • https://puzejiwitamino.weebly.com/uploads/1/3/1/4/131453698/2957867.pdf
    • https://cdn.sqhk.co/fadejiweruw/yiaSLhg/42611258659.pdf
    • https://wivetagimogik.weebly.com/uploads/1/3/4/6/134618772/c1bbe24e839075.pdf
    • http://lakujalinifibo.mypressonline.com/apprendre_l_anglais_facile.pdf
    • http://dokaxirugik.medianewsonline.com/amartya_sen_capabilities_approach.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bemuvarewu.onlinewebshop.net/train_tatkal_reservation_form.pdf
    • http://zisukuvi.atwebpages.com/programa_free_to_word_converter.pdf
    • http://rizinesuri.epizy.com/guess_brand_logos_level_165.pdf
    • https://s3.amazonaws.com/gazitif/kekovut.pdf
    • https://s3.amazonaws.com/jejulurowev/54040598849.pdf
    • http://pexofapu.myartsonline.com/bacteriophage_genetics.pdf
    • http://besipopi.epizy.com/vidmate_apk_old_version_softonic.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae7.bin
75f8615752bbb29404fdb81f7bcbd305dfca065d4dd919c35abf53cc80de64cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 5304 bytes

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