Malicious PDF — malware analysis report

Static analysis result for SHA-256 3824901a7952ffd7…

MALICIOUS

PDF

77.1 KB Created: 2021-04-08 23:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 94a3424ae464c52e262b3322831961c1 SHA-1: 1927b8b6b2e3399358e6134f3637b9e55e27f0d6 SHA-256: 3824901a7952ffd767388e78da57bab3b45f5fc82b2f6ca17deda4e203c85954
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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/strik?utm_term=mark+divine+unbeatable+mind+podcast PDF link annotation
    • https://gowigejovijori.weebly.com/uploads/1/3/0/7/130740297/2111e307.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/pQibRhL/4362181753.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/iBFjjja/greatest_hits_rock_70_80_90.pdfIn PDF document text
    • https://muvuvudu.weebly.com/uploads/1/3/5/3/135351086/xojetus.pdfIn PDF document text
    • https://fukukajapojuj.weebly.com/uploads/1/3/2/8/132815924/jagaba.pdfIn PDF document text
    • https://rowofijiguni.weebly.com/uploads/1/3/4/4/134479741/1422173.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/8544707.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/a318861a8478b.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/ja8Rrge/42937752470.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/ibhVhdW/megumipatopuzuvagexekazaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jazofi/hp_elitedesk_800_g1_tower_pc_core_i7-4770.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/49605968781.pdfIn PDF document text
    • http://dunoziboxisi.epizy.com/99020924481.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/66239291139.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/fegojovo.pdfIn PDF document text
    • http://pusevim.epizy.com/57965005752.pdfIn PDF document text
    • http://muxolisakij.epizy.com/juranutesekediwupeweguxo.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_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 5488 bytes
SHA-256: 5244eb12f6a11ca0cd7e4cae69da02248a124db18ab89db16cea9153fa2618bb
font_01_sfnt_off00010423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 10344 bytes
SHA-256: 83b3021467fbc451da6ccedec6c0592329cdea68fa92bfa84c8813654ddc29c3

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