Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f044f869641970…

MALICIOUS

PDF

85.9 KB Created: 2021-03-15 08:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9865a3a480e9d9e4d3b76cdca072a32d SHA-1: db591182d9600e3187ebc216f94374c5c6ca252b SHA-256: 60f044f869641970aeb90f83da2a0d8d2c48d3b8dd03b959d943d918a9c294e9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other file-hosting services, suggesting a link farm or a distribution mechanism for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=argumentative+essay+examples+grade+5
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/bejepal-sunozanasadowe-kopodamuma-waniziweme.pdf
    • https://nomomiwadij.weebly.com/uploads/1/3/3/9/133997716/xugipesosozef-zikisipa-sazofolu-bobof.pdf
    • https://cdn.sqhk.co/dalegoti/jayZMie/flippy_knife_download_pc.pdf
    • https://cdn-cms.f-static.net/uploads/4380882/normal_602c0dcbbfb61.pdf
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/6da3857c8.pdf
    • https://cdn.sqhk.co/tokofape/ehciaXn/diboxagesupot.pdf
    • https://cdn.sqhk.co/texafikogot/hc7hcid/ultimate_horse_simulator_2_bosses.pdf
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5fd1c94cd24a1.pdf
    • https://cdn-cms.f-static.net/uploads/4403428/normal_603c765d2ebe6.pdf
    • https://dotudamel.weebly.com/uploads/1/3/5/3/135326114/naduwud.pdf
    • https://cdn.sqhk.co/pugirunosamo/EQifbib/gebaditelu.pdf
    • https://cdn.sqhk.co/pumafuki/ghhgvjd/mesezorarabov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tefabonapo.rf.gd/guzanesezosirub.pdf
    • https://uploads.strikinglycdn.com/files/cb88e020-ccbf-4d12-805f-c76e3733f3a4/how_long_do_you_cook_a_turkey_in_a_rival_roaster_oven.pdf
    • http://sotexazonilot.rf.gd/wovogurejipu.pdf
    • https://uploads.strikinglycdn.com/files/c1f443ef-da68-44db-9d0d-eb21f25481a8/61377851956.pdf
    • http://zebikijixikemas.rf.gd/directv_hr24-100_internet_connection.pdf
    • http://vobujubiga.epizy.com/velaturuginuniz.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_off00011183.bin
3a75ab5b31d53e4ac0d3ddc18758f2f1e093654a217d8c11a817d8511dbc54df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 5624 bytes
font_01_sfnt_off000124a7.bin
6129e17423420e63e542051df4f8dd0245dbd8e4f6bf4fc831ad5b7f0b50f278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 10948 bytes

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