Malicious PDF — malware analysis report

Static analysis result for SHA-256 930821d4c528e63a…

MALICIOUS

PDF

73.5 KB Created: 2021-06-06 09:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 951d17ae49b269507f7d177bd2a86c05 SHA-1: aa1a24d4db91b30362b4e2df187ad4b155613dd2 SHA-256: 930821d4c528e63a0e7f35fce0594f6f90f5b27746e4bdbb3c3fc1c6bf0a27c0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The document contains a large number of external links, suggesting a link farm or phishing attempt, with one primary malicious URL identified. The document body is heavily obfuscated and appears to be generated content, likely to mask the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://ponafet.ru/123?utm_term=worship+song+lyrics+and+chords+pdf
    • https://giwojagamepebew.weebly.com/uploads/1/3/4/8/134881383/86037cf5ab1.pdf
    • https://bosogafowobalo.weebly.com/uploads/1/3/4/6/134614472/2404648.pdf
    • https://sudateneturoxa.weebly.com/uploads/1/3/4/3/134322726/notuwa.pdf
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/da895ee558c5754.pdf
    • https://jaxefosizi.weebly.com/uploads/1/3/6/0/136083017/pavawuz_zufiz.pdf
    • https://kojiwoxoposegig.weebly.com/uploads/1/3/4/1/134108885/4722750.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3a0b1eb1-265f-4164-902b-20e312fbcd21/how_much_appearance_fee_do_you_get_for_being_on_judge_judy.pdf
    • https://uploads.strikinglycdn.com/files/e4c15cee-eb9e-49d9-a2a3-a406d8de9d48/tintin_online_movie_game.pdf
    • http://kakexigodelo.pbworks.com/f/jodekipuxu.pdf
    • https://uploads.strikinglycdn.com/files/0b356342-91fc-4329-bfb4-fb75f6d49b23/45752601196.pdf
    • http://wixumip.pbworks.com/w/file/fetch/144683415/50828290251.pdf
    • https://uploads.strikinglycdn.com/files/d9ff7a77-dad2-4fbf-aa13-02faef7fbdab/34006817006.pdf
    • http://takenerexa.pbworks.com/f/what_does_it_mean_when_someone_is_drawing_a_blank.pdf
    • https://uploads.strikinglycdn.com/files/a64e2a89-1e87-4171-b7a1-19257fd806e0/what_is_considered_a_calorie_surplus.pdf
    • http://dadilotofexi.pbworks.com/f/backward_counting_worksheet_for_class_1.pdf
    • http://bovojigu.pbworks.com/w/file/fetch/144424500/bible_reading_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/100a0b57-ac8b-4562-9cf2-922ab6330a29/how_to_check_day_trades_webull.pdf
    • http://ziludezubeju.pbworks.com/f/situbukijakexubu.pdf
    • http://kumarifili.pbworks.com/w/file/fetch/144622992/how_to_remove_film_roll_from_camera.pdf
    • http://lakejidumap.pbworks.com/w/file/fetch/144702795/how_to_add_sounds_to_alesis_sample_pad_pro.pdf
    • https://uploads.strikinglycdn.com/files/6a008c74-fc64-473b-ba98-97af44c159a6/comparing_fractions_worksheet_5th_grade.pdf
    • http://jitijaloj.pbworks.com/f/economic_substantive_due_process_definition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe1.bin
496ed90f0ccde632621eebce3e56cb7ad2bf20da0f0bd8d94bdcaec357213af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE1 5532 bytes
font_01_sfnt_off0000f2cb.bin
14703018b98a4bcc46e7050bf2ee64cb552232cc29807654ce406868b407d345		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 11164 bytes

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