Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d6a8a7207d6814…

MALICIOUS

PDF

75.7 KB Created: 2021-01-20 00:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a599fd835a5894c82700650e9ebfe5a9 SHA-1: 78d504a9913c891b39292f36014fbbfdd7798ad4 SHA-256: 29d6a8a7207d6814f84912adb4e2779fa9f4e946979d8d782d7164c8c8983df5
184 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though truncated, suggests a lure related to a resume, likely to trick users into clicking the malicious URL to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/123?utm_term=entry+level+graphic+design+resume In PDF document text
    • https://cdn.sqhk.co/jawutuwek/gfrkjbU/96683445408.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/u3iiic4/child_development_learning_difficulties.pdfIn PDF document text
    • https://site-1178255.mozfiles.com/files/1178255/gusilugunazekom.pdfIn PDF document text
    • https://site-1171628.mozfiles.com/files/1171628/smartthings_motion_sensor_turn_off_lights.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/iijibge/block_puzzle_wood_legend_app_download.pdfIn PDF document text
    • https://site-1245213.mozfiles.com/files/1245213/83585815510.pdfIn PDF document text
    • https://site-1224335.mozfiles.com/files/1224335/instrument_list_count_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/xbhjfhe/63711848094.pdfIn PDF document text
    • http://zamividiwido.22web.org/kashi_amarnath_full_hd_movie_bhojpuri.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/rubidokezive/map_of_san_francisco_with_landmarks.pdfIn PDF document text
    • http://funizenobuwuka.epizy.com/86033980133.pdfIn PDF document text
    • http://pipiwilevo.rf.gd/nokaranakewubibuno.pdfIn PDF document text
    • http://bomepexajusopa.epizy.com/indesign_software_free_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/insiders_report_2018.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_off0000eaf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF3 5608 bytes
SHA-256: e2d8c9ff7472fd510b5a0f6454725708f8e606f124fd278eaf720a008f175ca4
font_01_sfnt_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 10424 bytes
SHA-256: d358483b1ecfdfdbbcbf3a872b663cf79f2655628ed2262d28ef2f999fd43c27

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