Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c2de1669a41f4f…

MALICIOUS

PDF

75.8 KB Created: 2021-05-05 21:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f2bb643387fe08e458d9e71817b7ae44 SHA-1: 8f9c82053d42dba410d859a970d5a2e5c242d383 SHA-256: 19c2de1669a41f4f1d9f29476064da9eee9c456ce20a3555259f251c6d4d6610
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=how+will+i+know+if+my+transmission+is+slipping PDF link annotation
    • http://fofifokese.iblogger.org/40924986103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371543/normal_5fc8b7af2700f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_6049edb985a96.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/cercle_de_la_forme_saint_lazare_planning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_60420a7c58e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_60469a59938af.pdfIn PDF document text
    • http://winokuzovew.iblogger.org/jakugidibazesise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481510/normal_6052f91463942.pdfIn PDF document text
    • http://wepipedudi.22web.org/comment_joindre_2_fichiers_en_un_seul.pdfIn PDF document text
    • http://wisiripivi.22web.org/7193877896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/90239a64-4d7d-437d-802c-ba986ea4a178/51568326304.pdfIn PDF document text
    • http://nerokigonone.rf.gd/all_english_opposite_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bdd3f39-cdc7-4c57-9783-6aa0ebe39a39/95005593773.pdfIn PDF document text
    • http://murawarex.rf.gd/2847793330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09245b83-dc29-4457-b0c1-f72f8805e96a/is_the_bounty_hunter_code_canon.pdfIn PDF document text
    • http://jefazad.epizy.com/download_novel_ceros_dan_batozar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba75a24-6368-43b4-bca9-af489c9b8b00/river_flows_in_you_guitar_tab_sungha_jung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7857ac87-7092-4fa0-9a75-1cd354dd36ba/16522023417.pdfIn PDF document text
    • http://jisaxabajerofu.epizy.com/conversion_of_length_units.pdfIn PDF document text
    • http://vitipazapabixu.epizy.com/canon_mf3010_printer_user_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE64 5112 bytes
SHA-256: 216a2b065351510d42d4545b713a143d6b3a656bf2fefae6dfa0cd8392643226
font_01_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 9956 bytes
SHA-256: d48c462cc0ab8a7987254389da66a25cfad25567e3c6ad6d0d383e873c99a695
font_02_sfnt_off000111c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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