Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f9a9b99535df04…

MALICIOUS

PDF

80.2 KB Created: 2021-04-28 22:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7f461327718ce9d335829a0c5a2eb790 SHA-1: 4c3c8cc2379edc211eb83244e4850c413362b410 SHA-256: 60f9a9b99535df046e3f79d1f5687895ace419dae886d1f54b3b885af8dd7d0f
186 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. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of an SEO link farm designed to drive traffic to potentially malicious sites. The primary external URI, 'https://gimoguvi.ru/strik?utm_term=how+to+choose+clothing+style', is likely a lure to engage users with seemingly benign content while redirecting them to a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=how+to+choose+clothing+style PDF link annotation
    • https://lefipejime.weebly.com/uploads/1/3/4/6/134668800/nosomeluzogiba.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/2cwXjjW/reparejuvujolig.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/fuwizararate.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/jfAFgi6/crud_sqlite_android_studio_github.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/xabanuvoji-zisuxorenib-vetunovubig.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/kikamamaxikuleb.pdfIn PDF document text
    • https://detawokigar.weebly.com/uploads/1/3/1/4/131453745/1c3be.pdfIn PDF document text
    • https://donarebam.weebly.com/uploads/1/3/1/4/131453010/ralenuzaberefatowok.pdfIn PDF document text
    • https://pukunave.weebly.com/uploads/1/3/5/9/135957849/napupazupalutijabes.pdfIn PDF document text
    • https://zijovegumasapal.weebly.com/uploads/1/3/4/3/134307166/57bb74b2e09e57.pdfIn PDF document text
    • https://ligunoko.weebly.com/uploads/1/3/4/3/134308404/72ec9.pdfIn PDF document text
    • https://gutasoleniv.weebly.com/uploads/1/3/4/4/134481560/lafitepofivaxulufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_9c49b6b3e38845db9c23c6c91e6b1f8c.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_41e02f91b0644fcebb3db5bccb142870.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b4dad0-e3c1-4cd9-8bf8-5df208ff4e18/57525723987.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_638b2cbc44194004b13154d744d10f7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81c8d95-5e08-4845-bdc4-32e675745d6f/merit_badge_counselor_list_gslac.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_a70ce510b9444f6aa9b754b5d4042482.pdf?index=trueIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_830b99c1e17344778875c189f414f3f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c6bad7b-dc16-45d4-ad93-5d42501e5d25/xujexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3675828-8e60-4acb-b4b4-a5ca010460a6/wereketexojoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7777eb3-de24-4974-bd33-406f323896a4/nordictrack_e7.0_elliptical_price.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5A 4908 bytes
SHA-256: 3b434c4ce1d378930835cf5cdae69e9c88bb21a8a597fbe7529541722b91709d
font_01_sfnt_off0000fc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1E 6856 bytes
SHA-256: 2f5d1fdee4be32f8d7b0a950ec9e31ae72aff5ad130a97ee13b3d268f2adc4ec
font_02_sfnt_off00010eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB5 10956 bytes
SHA-256: d292b10054c4d816465bfdbc37c7fb110acedd1382cf21c60c9bd4936d663a45