Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eff3707886d207a…

MALICIOUS

PDF

74.2 KB Created: 2021-02-27 18:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: efba4cab20109f8523fa2acc8aef0ec0 SHA-1: 93013ff08b04e8d8d3c111f5259d0bfed1801405 SHA-256: 9eff3707886d207ac1ee5a54528240f775e073be58113537617ac02fdb1e3b49
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document body, though partially obfuscated, suggests a lure related to resume keywords, directing users to potentially malicious domains like fokemale.ru and azalea.store. The presence of multiple disposable hosting links further indicates a phishing or malware distribution campaign.

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://fokemale.ru/123?utm_term=what+are+keywords+to+put+in+a+resume PDF link annotation
    • http://azalea.store/3132164015o7p88.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/iCbifOX/20811999582.pdfIn PDF document text
    • https://cdn.sqhk.co/gopepilexafi/2hd6jge/ant_warriors_hacked.pdfIn PDF document text
    • http://jobware.pro/how_many_test_are_there_for_cdl_permitoz3ot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_6016491f28281.pdfIn PDF document text
    • http://rutefozur.22web.org/mame32_bubble_bobble_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/ihjGtfo/huawei_health_app_ios_update.pdfIn PDF document text
    • http://maddot.space/86158920862n2vby.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/jgdwIcA/painting_drawing_sketchbook.pdfIn PDF document text
    • https://bojepelesu.weebly.com/uploads/1/3/5/3/135350442/jajagigokipakaxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vijanemafe.rf.gd/96613546256.pdfIn PDF document text
    • http://sugizujesel.epizy.com/xaxunagaregotarujaputu.pdfIn PDF document text
    • http://jetubomubiko.epizy.com/fallout_4_mods_pc.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_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 5440 bytes
SHA-256: 3b6b485230d365142a8fff219c11eb53a61f43328debb22e613388c407846761
font_01_sfnt_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 10700 bytes
SHA-256: 05a30fc32e0a5c7a0556b19fff8071217272a9f0221ff9ecc4d1f792cd1d9f8b

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