Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ceafb22e34eeda1…

MALICIOUS

PDF

82.7 KB Created: 2021-04-15 13:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ae2d80dd7422dc6a40647e6f6f55cc38 SHA-1: 23101607d2be6e468657dbeb0e1e0021bb4c828d SHA-256: 8ceafb22e34eeda1def29b920225d7c962528a3ab50f662c22995d9818e9b6f5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to property values, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=cuanto+vale+un+metro+cuadrado+de+terreno+en+chile PDF link annotation
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/tekivuzelij.pdfIn PDF document text
    • http://fruittea.space/16740543407r9qvx.pdfIn PDF document text
    • https://koredude.weebly.com/uploads/1/3/1/4/131406285/150394.pdfIn PDF document text
    • http://familyit.info/is_it_possible_to_get_a_free_background_check4jej0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501484/normal_6003fd07df41d.pdfIn PDF document text
    • http://domavera.ru/cambridge_advanced_vocabulary_in_contextdt8dy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487663/normal_5ffaabeb7e9b0.pdfIn PDF document text
    • https://cdn.sqhk.co/xalisufa/bja6ifX/75771919795.pdfIn PDF document text
    • https://cdn.sqhk.co/salasereki/jfghjda/gluten_free_mini_bundt_cake_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/2hi7Qia/braves_ballpark_history.pdfIn PDF document text
    • http://aicberg.net/scag_cheetah_61_parts_diagram3jiyc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_603d1d94a787a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_600f86102f01c.pdfIn PDF document text
    • https://sekirunive.weebly.com/uploads/1/3/4/4/134404638/vikuza-dunologapo.pdfIn PDF document text
    • https://tefuxaforubexo.weebly.com/uploads/1/3/4/4/134446539/1369d90fb60b21d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_604d41fa9188d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_b0c6a0a873e54856bffd3e692458862b.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_ede1eb07e47d464b8ae6c161d4ee522f.pdf?index=trueIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_240837b4dfb645249b01483c12f0441e.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_4f90baadcaeb4bedacb9aa9b58ca7e0b.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_75515fd0a4b04cef8936b8636bd5109c.pdf?index=trueIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_c96c95c932c04b2aaca69003e358a64d.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
    • 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_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 4964 bytes
SHA-256: f340196e5243927fef1ebe6397cb5464c015d21356debedec7cd7095d128915e
font_01_sfnt_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 11624 bytes
SHA-256: b0f400332d3266b5ab868ca1d827bb3e19700ca243cc799bede409083425679a
font_02_sfnt_off00012593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12593 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

Open this report in the interactive analyzer, or submit your own file for analysis.