Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dccbc4e4a54c3a…

MALICIOUS

PDF

69.4 KB Created: 2021-04-11 20:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3a317f32b6325b9890f1bfcae3e53fc3 SHA-1: 2125415fc55aa52ff2c0bafbd18fd08303b3c116 SHA-256: 27dccbc4e4a54c3a8da3d4d561f464db9ec32cb95d7df1ec251f283079ce7f65
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'jottigo.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests an attempt to masquerade as a physics textbook, a common lure for academic-themed phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=physics+halliday+resnick+krane+volume+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ffbdee26b6a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_605ba459044f3.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/dqvgghg/vifup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_605c14830d682.pdfIn PDF document text
    • https://cdn.sqhk.co/xavejapati/hhjejdV/31115789914.pdfIn PDF document text
    • http://gamedv.design/bozonifuwezadarujiwuzillk3j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_6058cb5fefaaf.pdfIn PDF document text
    • http://dimax-matrasy.ru/7527592914708rwy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_6048be93a5074.pdfIn PDF document text
    • http://dutov.org/how_do_you_program_a_radio_shack_triple_trunking_scanner1bqb4.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/mgjgi1C/84446801769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65306c7a-c2a5-4101-9401-3e633e4427db/julius_caesar_characters_brutus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17dc121-8d64-4bff-85bf-58c7e2d37f91/vebanadalirezar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a2d04d-388a-41b2-82f2-ccf6f599a55c/tokyo_ghoul_re_anime_season_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c5174f-67d1-495d-a52e-43dfce115a52/how_to_do_bubble_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457960cb-29f1-4182-86eb-7a878c1bef79/what_colour_are_balloras_eyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3ecc3d-38a7-4ffa-a25d-e033bfee7692/the_alchemist_paulo_coelho_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f72f0f-fc89-426c-bb88-1331bb921b62/trauma_release_exercise_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9869f2-368e-4fb3-90b1-3163f2f4fe67/conair_turbo_extreme_steam_gs38_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025daad5-c541-493a-85e0-36b240d72254/fifty_shades_of_grey_mp3_songs_free_download.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_off0000d035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD035 5540 bytes
SHA-256: cf7b78f3086c50f3c3ac2ecb3fb353b4e7ad78e5d090982bcc781e372d3b4858
font_01_sfnt_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 10912 bytes
SHA-256: a21d6b6fc755149df12458b9ef75ffe6a2364a026777e27d9900380896c08459

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