Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f5cf0b2837db31…

MALICIOUS

PDF

62.0 KB Created: 2020-12-08 03:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: e633c34033a55c844b1d785b43287957 SHA-1: 42438a60c7b5dc9562c00ecfd2a31d58e28a6ae8 SHA-256: a9f5cf0b2837db31e74c5101d2ea493e432a990bf79129d70fbd85524a24989d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/strik?utm_term=compound+words+worksheet+with+pictures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422914/normal_5fbcf3afc8435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_5fadbf06c34bc.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/xelimewat/daisy_powerline_5501_air_pistol_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15db6f5-2251-4ac1-89f6-36d7c166d8d3/36676093394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ebaa44-6c39-4b31-bc14-a979bfb366df/transitive_and_intransitive_verb_wor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1198ae5-60f8-4177-8ac0-36b47c55609e/cbse_syllabus_for_class_10_science_p.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/binuzelemejurotisolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3452b55-656f-4513-8f65-dee823ecb1c5/golds_gym_xr45_user_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27d2011f6a419848fbce5/t/5fc81c7abbb7f45a927d7201/1606950013081/best_american_truck_simulator_mods_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/carcinoma_de_celulas_escamosas_en_animales.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/road_test_score_sheet_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/crazy_frog_racer_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/wowalefuk.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/boy_scout_uniform_type_b.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/nugevonuves.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_off0000b688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB688 5132 bytes
SHA-256: 7939df0b362555060fb9e35f0f47b85d67d130f2086fdcb8e7dee11745f663f7
font_01_sfnt_off0000c7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E6 10452 bytes
SHA-256: a20189da81ea422fa7d9f140ff3cfdbc25111e2a6fbc06316db5a8731e475541