Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ef1715e3481820…

MALICIOUS

PDF

80.8 KB Created: 2021-03-22 07:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f729ad216e705a77a4e82bc91618c6de SHA-1: 8b4a666902ea802fa4eadad644bcefb0a553127c SHA-256: 34ef1715e3481820ada29c118bef6995077937ad44fd17837aaa68e94e2988d2
186 Risk Score

Malware Insights

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

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 0.9996

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://botokaw.ru/123?utm_term=examples+spreadsheet+software PDF link annotation
    • https://rixemovupel.weebly.com/uploads/1/3/1/6/131606965/xamuxovedav.pdfIn PDF document text
    • http://esclub.info/74732700762rqa5k.pdfIn PDF document text
    • http://xabidewukolesas.66ghz.com/84999978725.pdfIn PDF document text
    • https://cdn.sqhk.co/rizuwevize/ghNkihb/neworuge.pdfIn PDF document text
    • http://daravto18.ru/81356186668qc6bt.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/gjfjjjd/69525603901.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/eQZuf7X/grandpa_and_granny_house_escape_mod_menu.pdfIn PDF document text
    • http://jakartapro.xyz/25051337618ot8d1.pdfIn PDF document text
    • https://wobofosowipifir.weebly.com/uploads/1/3/0/7/130776138/2648103.pdfIn PDF document text
    • https://cdn.sqhk.co/munuseji/icheqCJ/mineral_fusion_concealer_duo_neutral.pdfIn PDF document text
    • http://organicnu.info/suxovbf7kr.pdfIn PDF document text
    • http://romeita.space/pejisowegoxomwsspr.pdfIn PDF document text
    • http://avto-document.site/bakogesogofagunemozudy4shm.pdfIn PDF document text
    • http://trynutra.shop/71802042800u8mfs.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/bjdmjcp/78591209639.pdfIn PDF document text
    • https://lidimegofomizut.weebly.com/uploads/1/3/1/3/131380930/f6e025fa.pdfIn PDF document text
    • http://ideaita.fun/bobcat_610_parts_manualo93wy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_2d3493c310de4e49a7c6482f72a8df07.pdf?index=trueIn PDF document text
    • https://8b1d1a20-f0f3-43d5-aeb5-704ac988d6c7.filesusr.com/ugd/9dbc1d_755100bc9fd14916a0918d4cf3df22c6.pdf?index=trueIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_a81e1ead40bd4f90bab6ae0c4878c737.pdf?index=trueIn PDF document text
    • http://madukavinoxonal.epizy.com/bohat_tta_rad_jak_investovat.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_e3e50b6b016f4bb084bfdfb30b59d45e.pdf?index=trueIn 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_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 5396 bytes
SHA-256: db9559a0fcbac097d9716435d90cbb7a2d9f40c31857867f131a4afb5c1d7c91
font_01_sfnt_off000110a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A9 11268 bytes
SHA-256: f30a9e78e7253ab049061419f489a1f5cf7f1c64e5cd9c3ea8f8204f422aa37a

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