Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93b60eebe70febe…

MALICIOUS

PDF

85.3 KB Created: 2021-02-28 20:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 171dc323a54c9430b81427c213f74e74 SHA-1: cd1c80ac712f79e02330c663b1eadd7e661b7bb0 SHA-256: d93b60eebe70febe31fca6536cd42568d889d84f59e6036fba9141632ba471a1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it likely exploits a vulnerability for client execution. The document contains a large number of external links, suggesting a link farm or phishing lure. The primary purpose appears to be directing users to potentially malicious or scam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://vilenefex.ru/strik?utm_term=genero+literario+del+cuento+el+hijo+horacio+quiroga PDF link annotation
    • https://cdn.sqhk.co/padasagam/g6qd3HF/fast_save_for_instagram_app_download.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/what_is_critical_literacy_in_education.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5fc7cf33e6675.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/Rjggehc/dimomugufawegorotevise.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/gf3gcif/the_walking_dead_season_2_reggie_voice_actor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459326/normal_5fe22e6e733fc.pdfIn PDF document text
    • https://pufokebisuniga.weebly.com/uploads/1/3/5/3/135324869/sevovizak.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/how_to_convert_a_3_in_1_crib_to_toddler_bed.pdfIn PDF document text
    • https://cdn.sqhk.co/mujutuzidip/gLChbPr/40945178995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461505/normal_5fc7cc12ec954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_602451c9a836f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_60199876371c5.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/sopamudazokorape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gojoxefesubir.epizy.com/wolipalofel.pdfIn PDF document text
    • http://kurejewupom.rf.gd/is_gtx_970_good_for_cyberpunk.pdfIn PDF document text
    • http://jilagikudi.rf.gd/star_template_with_lines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001017e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017E 5140 bytes
SHA-256: 1f24c63938a081e7434a508db95ec304fde909d47b197a90ce731c5f0328a84d
font_01_sfnt_off000112e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E6 11480 bytes
SHA-256: 069fb0fa037c948aea4e604258517a22cf55ef9c90c1c28fda614efed72b3203
font_02_sfnt_off0001381e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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