Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f2821576a1c929…

MALICIOUS

PDF

72.6 KB Created: 2021-04-07 01:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 908fb3088ea1b97505b22e7b94693ec0 SHA-1: 1143510cadaebae14c1db1e2fbf7b552ad235f98 SHA-256: e8f2821576a1c929f89334bb30e8dfaa800b037506fc5711a0f2e7530f06091a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a heuristic indicating it's a phishing lure that redirects to an external URL. The embedded URL, https://lozipotod.ru/wix?keyword=yagi+the+goat+patreon, is flagged as a high-risk indicator. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/wix?keyword=yagi+the+goat+patreon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457868/normal_60462957f3b1b.pdfIn PDF document text
    • http://poriwesebu.22web.org/inject_malicious_code_in.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/que_es_el_conductismo_psicologia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_6011e447c5b5a.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/how_to_use_the_super_snark_tuner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gifiz/lokis.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/how_to_change_drain_hose_on_lg_front_load_washer.pdfIn PDF document text
    • http://wusuposakatoxel.myartsonline.com/suninironusoz.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/brother_in_arms_mod_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f51b99-06cf-42d4-889d-8fb6969da323/11808457099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed930e2-d2dd-40d4-8c90-614632a25100/49763834076.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/petofo.pdfIn PDF document text
    • http://wonoxokibe.rf.gd/jaxixidukizibum.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/kotedawupinexuzapapal.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/building_energy_audit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/how_to_write_a_thesis_for_a_film_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/cinderella_movie_cartoon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbd3723-c06f-4903-a263-25dad610cb6a/thermodynamics_book_for_chemical_engineering.pdfIn PDF document text
    • http://surifuj.rf.gd/91883263742.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 4832 bytes
SHA-256: 93532f32944babb090ed3e5378ee1a3e9188322dd6af4b3078455c1bde2bad04
font_01_sfnt_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 11240 bytes
SHA-256: d68554a3502327ae95efac2d611b314e6b4d6b82bf656088f0cb7a398e0bafa6

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