Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c1a3b5144518ea…

MALICIOUS

PDF

75.1 KB Created: 2021-04-28 10:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d707241e68634d1db436653479f7ea20 SHA-1: 22fd2ef6039fb4d6c801e63ec49222b667357be9 SHA-256: 02c1a3b5144518eaf1902f4c6a069f6540872b50611238b4d7499205ddf8ef43
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://jottigo.ru/strik?utm_term=what+fish+do+you+eat+on+the+mediterranean+diet` points to a domain known for phishing activities. The document body, though heavily obfuscated, contains metadata suggesting it was generated by `wkhtmltopdf`, a tool sometimes used to create malicious PDFs. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=what+fish+do+you+eat+on+the+mediterranean+diet PDF link annotation
    • http://zigajubo.22web.org/17381564534.pdfIn PDF document text
    • http://wajujofapukalim.22web.org/bethany_hamilton_book.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/vabedafozo/89304836048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2caf1f45-0841-4eaa-929a-f6d281edd89a/how_to_replace_belt_on_dyson_ball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401cd7d4-181d-49ef-af1c-9bcfe84d0e8b/58181270570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e262979b-df66-4f25-a503-51acbe96d4b4/babadulokoxidiluvusatato.pdfIn PDF document text
    • http://pudopotodu.epizy.com/17469105675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425a595a-da6b-4ac2-9ba8-70b453870db2/atlas_copco_compressors_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1889453-0497-418a-9968-cc2ac83e446f/18889641913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef89923-7284-4266-a945-6201c035e594/20516654368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3340701-2f78-484a-b3c0-0587ad791d57/kepekiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381fdaf2-bf38-4f79-9f6d-5b713d64e658/influencer_the_new_science_of_leading_change_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/aintham_padai_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/vewilobeluv.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/how_long_does_an_apple_tv_remote_battery_last.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/xabifepubisefur.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/bacillus_subtilis_identification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28f0b8e-ab0c-49e5-9879-1a8d2face5a4/5991954360.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/the_american_rattlesnake_cartoon.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/where_can_i_donate_clothes_for_veterans.pdfIn PDF document text
    • http://sivojosifa.epizy.com/infosys_corporate_governance_report_2018.pdfIn PDF document text
    • http://zasogiw.epizy.com/can_u_play_rock_band_4_with_a_controller.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_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 5232 bytes
SHA-256: abd09126caa8aaa3c751b060ae2e33356eb7b0c7794fe500d1c6f852976e916b
font_01_sfnt_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 10936 bytes
SHA-256: 27176af04947d0141e284206bae249f9916f388f92f745e6de997ae40f4249c6

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