Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ba87aa0a52d937…

MALICIOUS

PDF

89.9 KB Created: 2021-03-20 05:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 742722aa4f1a1013b2e2f1d9cabfda62 SHA-1: 15fe6f0e62ed6bfbbd8ec1e87e5f8280cfdc6921 SHA-256: f7ba87aa0a52d937ea2640e29bc2670017697972f2aaf05bc47a1eb740b4b0d4
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to 'email marketing guide for beginners'. No scripts were extracted, but the PDF structure itself facilitates the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/123?utm_term=email+marketing+guide+for+beginners PDF link annotation
    • https://cdn.sqhk.co/nanagajog/uNiehhe/30904017870.pdfIn PDF document text
    • https://cdn.sqhk.co/rizuwevize/2I8Icje/go_tractor_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vamapoludi/23ksIwa/planetary_annihilation_titans_g2a.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/ifieB7v/pass_with_flying_colors_idiom_example.pdfIn PDF document text
    • https://cdn.sqhk.co/kadunila/fyk3ybW/bebomojelaxogewowa.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/ghdhikK/febomuxekesenogo.pdfIn PDF document text
    • http://voirlo.xyz/english_to_bengali_dictionary_free_download_full_version_for_pc_offlineendoh.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/jgLshbS/73249461155.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/jecje1G/android_auto_vlc_no_video.pdfIn PDF document text
    • https://cdn.sqhk.co/posuwumujome/T0jigIr/game_booster_one_tap_advanced_speed_booster.pdfIn PDF document text
    • https://cdn.sqhk.co/penutizufib/fheZif2/mefesenibebakulabajoweda.pdfIn PDF document text
    • http://bigwin-1xbet.fun/lakikbtgfp.pdfIn PDF document text
    • http://begdas.space/17968116943uxk7n.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
    • https://s3.amazonaws.com/miwolezedubujoz/kakeraxebuvitixagajaxok.pdfIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_6d4b1b1fd76b451a8624bc6d62351694.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/721920f5-4b24-4185-9b60-e23237602e10/41889492502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3b6af0-d462-472b-9409-4b952553c542/origami_crane_instructions_step_by_step.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_8667ba5c148646a1935a073d478827c0.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_ada0d116f2c54e7c88b146f231859bb0.pdf?index=trueIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_56bd52deba344351afca230085899130.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/onkyo_tx-sr608_manual_svenska.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb39cfe2-b16c-41f3-b47a-76e8bdd92787/13840991913.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_off0001174b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174B 5268 bytes
SHA-256: 092cf83bdd887873201c38333b8c370aa9a54669b0e4468e0bd12e58f2ffbdf3
font_01_sfnt_off00012918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12918 10144 bytes
SHA-256: 564f5cbf7d9d188286520b3181db30fbf48c3f31a7c9bd5d98cf1176227fa181
font_02_sfnt_off00014bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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