Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1813bdee7a4f01…

MALICIOUS

PDF

158.5 KB Created: 2021-03-15 13:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5fbac11b68a12e3e27759bc0a9719238 SHA-1: af46e8cd35e5b8e8eadf69fb8be1190fb21733e1 SHA-256: bf1813bdee7a4f0143af5ad8de96fd9c990ee3505a343087b7eeecd682c0215f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9987

Heuristics 5

  • 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 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://xajibur.ru/wix?keyword=estados+de+agregacion+de+la+materia+y+sus+cambios PDF link annotation
    • https://cdn.sqhk.co/subogutaze/hAQPQgf/jogar_super_tux_kart_online.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/eTigIB9/24_hour_food_atlanta_airport.pdfIn PDF document text
    • https://gozataxuwo.weebly.com/uploads/1/3/0/7/130740141/7e553af00e0153.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/how_to_run_python_script_in_atom_linux.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/aTii4dE/31932578284.pdfIn PDF document text
    • https://cdn.sqhk.co/mekizojo/NRiegh3/magic_tiles_3_gameplay.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/2769349.pdfIn PDF document text
    • https://xiwulugizasu.weebly.com/uploads/1/3/2/7/132741433/36a11d1f1b87e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376087/normal_5fefb443818c1.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/pascals_triangle_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd0bdcb7cffd.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/jeuvHqd/76076377258.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/autocad_underlay_print_quality.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/hfjd7mK/zakezuluzufe.pdfIn PDF document text
    • https://povejosidonu.weebly.com/uploads/1/3/4/5/134501776/wadusemenojejilux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_602d64a1121e7.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
    • http://zugujegezamuto.epizy.com/vodafone_mobile_wifi_r216_driver.pdfIn PDF document text
    • http://xiwaresijo.epizy.com/84291155607.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20ED7 5340 bytes
SHA-256: 72a0562488f9ab2d19eb93350de77eb99d996d7d8df575d00d47c2f7ad002068
font_01_sfnt_off000220ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220EA 11384 bytes
SHA-256: d7074eeadeeab798602a8551fc044d9daaebe25bb397acbf9a9162f9d16df181
font_02_sfnt_off0002462c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2462C 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf
font_03_sfnt_off00025b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25B5A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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