Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6ecfa8743a99df…

MALICIOUS

PDF

78.3 KB Created: 2021-02-28 17:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 98d9143c93d2719093c9c824c337df9c SHA-1: 9b3a79dce3e34a81e9d142a24b0aa590ad3eeebb SHA-256: ae6ecfa8743a99dfdd5ed2ac0ac406bf785938404af0decbf08c05cfcf84b690
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of embedded links, many pointing to disposable domains, suggesting a phishing or scam attempt. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user interactions or disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://jottigo.ru/123?utm_term=moped+tire+repair+near+me PDF link annotation
    • http://jadogaxarabu.mygamesonline.org/bonovovavap.pdfIn PDF document text
    • http://pewujok.mypressonline.com/why_is_my_dishwasher_saying_no_water.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/90885582631.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/19759375540.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/relion_confirm_meter_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5ff4906834607.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/de_que_ao_se_puede_legalizar_un_auto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453336/normal_601a824c59dfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425916/normal_5ff90e6cdf1e1.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/wutimin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462066/normal_600638c8a6ae2.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/gupebonatekowewulaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/boards_and_beyond_step_1_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/kindle_fire_hd_7_charger.pdfIn PDF document text
    • http://sesufutix.rf.gd/how_to_recalibrate_the_salt_level_on_a_pentair_intellichlor.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/vepekomuguwukabobi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 4900 bytes
SHA-256: 792f12515fc6f1032b4f9ed83d9f3e62ec30aa329b937bec502bbe25e06eff8a
font_01_sfnt_off00010761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 10852 bytes
SHA-256: 31ff232f94a82e5c0c6af91d1e972b2606d37c0e8d5a3245c4eb9f6a9f3d50bc

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