Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24d9a80f83a6928…

MALICIOUS

PDF

95.5 KB Created: 2021-06-09 01:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7e971951d9a53fd9338e162bcca36e7b SHA-1: 2345d1d3d8507916fc7d6b8361b670cda561078a SHA-256: e24d9a80f83a692869510633c1329f3f60f45ad1448031adfc39cb9484282883
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One prominent URL is https://jacksth.ru/123?utm_term=bwv+543+liszt+pdf, which is likely the primary lure. No scripts were extracted, but the PDF structure and link farm behavior indicate a phishing or malicious redirection attempt.

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://jacksth.ru/123?utm_term=bwv+543+liszt+pdf PDF link annotation
    • https://gajamonorafu.weebly.com/uploads/1/3/5/3/135389334/912469a21badc.pdfIn PDF document text
    • https://ravaratu.weebly.com/uploads/1/3/5/4/135401011/3648f7.pdfIn PDF document text
    • https://ziluxofizavamo.weebly.com/uploads/1/3/6/0/136009732/xetusedifijoxojiti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugewuvog.pbworks.com/f/phonetics_and_phonology_difference.pdfIn PDF document text
    • http://kibumezi.pbworks.com/w/file/fetch/144711030/dls_hack_profile.dat_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8195b5a1-eebe-4109-97ec-95ec665d79db/diffusion_ap_gizmo_answer_key.pdfIn PDF document text
    • http://lesokulovisu.pbworks.com/w/file/fetch/144564783/rorati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f73db2-cbfc-4c41-9b64-2cadcf64b092/how_much_is_a_rainbow_vacuum_in_the_philippines.pdfIn PDF document text
    • http://fevawigo.pbworks.com/f/bipemumup.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/nadetofojomotikotebupagik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ca14b9-d5b7-4047-a081-8adc8be016cd/babobaxematuvulepupekowek.pdfIn PDF document text
    • http://gaguwufajij.pbworks.com/w/file/fetch/144874539/deturapekodirofa.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/kujebulolat.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/w/file/fetch/144517476/junajubonovewuwitebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae0c23a-876a-4a9d-8a47-2007efb8d40c/volume_of_compound_shapes_worksheet_tes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a0543f-5bf6-40f1-9a3a-e3c7e4a878f5/28520140744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0eb243-fcc3-4287-83db-55ad4c215420/nipefemebe.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144485154/dalesagokanigijo.pdfIn PDF document text
    • http://bajaduxaxusi.pbworks.com/f/gaggia_brera_descaling_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a757bf-762e-4b93-b757-32a0e8056a0f/62803244441.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_off000135a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A9 5356 bytes
SHA-256: 12e0685f216dee12115329fffafef27e0cb175d898c22d6413a7e59a65a17a43
font_01_sfnt_off0001482f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1482F 12076 bytes
SHA-256: 4d1b180f1df4289b201b20e3a61bdb33a64b3dc5f19e7212702632cfbaaa6b56