Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2f67051ec349ac…

MALICIOUS

PDF

76.9 KB Created: 2021-05-20 22:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dde9c162f2c81be673f260c40cef68a3 SHA-1: 58a4a6274405c0fac7d5917745e5b57064e06c2e SHA-256: 0d2f67051ec349ac12e60520e656a00aef595c6095427d3b1a5840be8d0b2356
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, including one to 'gimoguvi.ru/strik', which is identified as an SEO redirector likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'free oil and gas aptitude test questions and answers pdf'. The presence of multiple external links and the nature of the primary URL indicate a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://gimoguvi.ru/strik?utm_term=free+oil+and+gas+aptitude+test+questions+and+answers+pdf PDF link annotation
    • https://tozuriko.weebly.com/uploads/1/3/1/4/131437247/fikupiwijijijamujuwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489983/normal_5fef9c805c258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_60567d86c1a1d.pdfIn PDF document text
    • https://wekijoborumotis.weebly.com/uploads/1/3/4/4/134484899/310b9c93ec.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/tinivukedeta/xazakelefunokegem.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/94546115101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcb6341-b56c-4670-9237-300966f53287/triton_ii_sand_filter_leaking.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/bose_acoustimass_10_series_ii_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/auto_format_in_oracle_sql_developer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f9ebd6-2b84-439b-b4cc-f4b7b3a775ae/nutusiguseno.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/bates_motel_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/abstracts_in_apa_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c139b89-420e-437c-9b70-64dba16b3301/listening_comprehension_exercises_for_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/aishwarya_wagedo_sinhala_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/ejemplos_de_simple_past_affirmative_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/62502574936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa22bd8-4c56-4776-a7bc-e38004d4e8f1/curse_of_the_high_iq_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b815920-d6fa-4814-a4b2-d5d1706b620b/roku_streaming_stick_plus_remote_pairing.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_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 5384 bytes
SHA-256: 48de90682934be0754107777a29a5a67a02e5cba95494b66d2c38f066f4dbe7c
font_01_sfnt_off00010050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 11224 bytes
SHA-256: 3c219a551d8d037d899b317e5b99dc3092cf7da97593e221081a9b2ae1b43c02

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