Malicious PDF — malware analysis report

Static analysis result for SHA-256 124acdba9eb423e3…

MALICIOUS

PDF

78.7 KB Created: 2021-03-15 06:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6fff9a6cf89ece3e89c6ff12801d86f3 SHA-1: a8c1224177901a79c36b9ffa7bd7907f68fdc3bb SHA-256: 124acdba9eb423e39cc3e6bcc6e68eea9219dec4d787d151c9445b4407ce859b
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, with critical heuristics indicating it is part of a link farm designed to host numerous external PDF files. The presence of embedded URLs, including one pointing to 'dugedepap.ru', suggests an attempt to redirect users to potentially malicious content. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics strongly imply a phishing or malware distribution vector.

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
  • 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.
  • 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://dugedepap.ru/123?utm_term=on+time+flight+performance+spirit PDF link annotation
    • http://fakaripeti.xyz/how_to_cut_calorie_diet_plan_a_15002ebjt.pdfIn PDF document text
    • http://copyright-helps-team.com/why_washer_wont_start957fi.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/how_many_kwh_does_a_tesla_model_3_long_range_use.pdfIn PDF document text
    • http://cartest.pro/32443750701pqg7k.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/2b47a554fe1e9d8.pdfIn PDF document text
    • https://rusofejez.weebly.com/uploads/1/3/1/8/131856127/5731247.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/arifureta_shokugyou_de_sekai_saikyou_light_novel_volume_9.pdfIn PDF document text
    • https://kewatedodi.weebly.com/uploads/1/3/0/7/130776291/c2aa1c37bc669.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/favilenoruzupo-sidosogup-zopenetipob-rolojanaraxopo.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/10851978489.pdfIn PDF document text
    • https://xefulexemifin.weebly.com/uploads/1/3/1/3/131398452/vijufi-biredel.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/how_to_use_control_solution_for_true_metrix.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/rafiralexezol/lomafefosemutimabodivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5832d41-29b4-428a-9eda-c05e62b708b0/46258338016.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/bharat_2019_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/black_and_white_formal_dress_shirt.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/41947133613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a835ee5-edf3-49af-86c0-a9f97f9bcde2/navy_radiology_technician_school.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/66369078035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950cb364-2da3-401f-ae4e-5d615077d2c7/how_much_money_is_needed_to_start_forex_trading_in_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/relative_clauses_lesson_year_5.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_off0000f4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C6 5456 bytes
SHA-256: 590df4030b2a2d39bc953591ecb3d5a6b961cda8b41b60443c4ba44a1721abc5
font_01_sfnt_off00010727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10727 11360 bytes
SHA-256: 63ab8cb0dcdf39bfb2e12ad4327f7647e196f724b9941eef717f92b3c9c32856

Open this report in the interactive analyzer, or submit your own file for analysis.