Malicious PDF — malware analysis report

Static analysis result for SHA-256 899bf7c1859c3f21…

MALICIOUS

PDF

33.8 KB Created: 2020-11-06 22:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: be545f92a58ccc08ab04237f6a95220f SHA-1: d64ad93cf8bebc797752b67a94c664b35c9bc17e SHA-256: 899bf7c1859c3f2181b480ffa7852195ef78710f41fc8d5554ea0826cab2a1d5
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 1.0000

Heuristics 4

  • 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://trafftec.ru/123?keyword=holy+are+you+lord+god+almighty+chords PDF link annotation
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/1185323d87123e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f88830520c6f.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/noduwojin.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/8547873d93593.pdfIn PDF document text
    • https://pulibunubof.weebly.com/uploads/1/3/4/3/134378852/zubelilitoma.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/7228583.pdfIn PDF document text
    • https://miwilokak.weebly.com/uploads/1/3/4/3/134375457/gawosizov_gufavikutujeze_dukiza_ridezugedeleguf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5fa04970327de.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/xaxuligixud-kesase.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/suxiweke/hill_climb_racing_mod_apk_unlimited_coins.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/map_of_trails_ridley_creek_state_park.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/58866374536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a784f25e-820c-4b27-ba8b-6c709de97bd6/31889794872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed44623-9670-4d9d-9893-dd45231c63ba/67942251256.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/bad_eggs_2_unblocked_full_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/voxewazokamozo.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_off00004640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4640 5416 bytes
SHA-256: bd28e507f0e57195aa8313ee6dac36ed774eda22c6d20b1ad7be17e5a1f9c413
font_01_sfnt_off00005887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5887 9976 bytes
SHA-256: a2deaf6efe76441f2ac1e2f127c163b7fd6af624e41372ad25d2db25e2a4e6b5

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