Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4cbe9f8f170d69…

MALICIOUS

PDF

76.5 KB Created: 2021-04-30 03:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 49b648566b8883cb12d07bf3c188172f SHA-1: b2d1fcf97091fa7bd52adb00fda31eca5cf9eae0 SHA-256: 0a4cbe9f8f170d694538d62702cd09477709d3357aba96270ff3b306fd33de3e
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 0.9998

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://seumenha.ru/strik?utm_term=tafheem-ul-quran+%2528meanings+of+the+quran+-+6+vols%2529+-+english+pdf PDF link annotation
    • https://pabimoju.weebly.com/uploads/1/3/3/9/133997489/lelamelinama.pdfIn PDF document text
    • https://cdn.sqhk.co/pibusupi/mhj9hc7/unblocked_games_uphill_rush_5.pdfIn PDF document text
    • http://shopsmmv.site/anatomy_and_physiology_crossword_puzgt8vb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ff294c060c75.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/OHSjfXD/rojuve.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/a7dgfhi/hot_wheels_race_off_all_cars_unlocked.pdfIn PDF document text
    • http://kyponnik.online/rijuvadugidolokodtw7hl.pdfIn PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/9631083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fff6121ca16e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_600fc183314c9.pdfIn PDF document text
    • http://ideaita.fun/nijiguzixatinaxisurib98vc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_603260b14bc89.pdfIn PDF document text
    • https://cdn.sqhk.co/womalakifaxa/a0WSXih/46782714582.pdfIn PDF document text
    • https://serekarivevug.weebly.com/uploads/1/3/1/4/131407867/satame_litegakupip.pdfIn PDF document text
    • http://verifybadgehelp.com/799495983099ymrv.pdfIn PDF document text
    • https://gelowabizum.weebly.com/uploads/1/3/1/3/131398428/7ae3c299b6.pdfIn PDF document text
    • http://rineset.xyz/student_information_system_sis_registration_davvznhvz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8929a650-787b-4dc8-9e72-805a10079b99/dejazawigojuzadinuxafixuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240cde69-3696-4eb4-8ad8-cb2d8b61c18b/weber_spirit_200_300_series.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 5932 bytes
SHA-256: e7655cb2c6e6852bcdc5a0add91837dbc003c6742d160978a9dc79e310439202
font_01_sfnt_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 10416 bytes
SHA-256: 560c0f3320afebf3adc24909b9451a85bf15a1e3b57f61b1da693c2ca7566145
font_02_sfnt_off00010b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B67 17136 bytes
SHA-256: 699f715ae4205ffbdfd7b35d1c59ff7afdab9322a4596f7e0aa45902af96c750

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