Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc345221b84e7b7…

MALICIOUS

PDF

112.0 KB Created: 2021-03-08 14:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9f52826340d6891cc7cf2cdd02150a44 SHA-1: 9e1df54c98e8745747766d1307a12d501a0247ef SHA-256: fdc345221b84e7b7b49f865e06c9730d470e663fa358efefd8e227ef590fa203
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 0.9998

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
  • 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://xajibur.ru/strik?utm_term=what+is+a+gtx+970+equivalent+to PDF link annotation
    • http://ranking-se.com/kepesigijiwudokatijisoz1zkm9.pdfIn PDF document text
    • http://sovetnik53.ru/radiohead_songs_about_lovedjnxl.pdfIn PDF document text
    • http://pihodze.com/997105091107nea.pdfIn PDF document text
    • http://belkwigs.com/wujunroigr.pdfIn PDF document text
    • http://lalat.space/integer_word_problems_grade_8meyql.pdfIn PDF document text
    • http://gratoraama.space/72585952800hemr1.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/hoDjijj/jixelaxitilojunaraw.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/igkesgj/74222637237.pdfIn PDF document text
    • http://keksik24.ru/pozaviypn7n.pdfIn PDF document text
    • http://sodaapp.club/apa_citation_format_research_reportr0uqv.pdfIn PDF document text
    • http://jidugisukeranav.iblogger.org/58766569042.pdfIn PDF document text
    • http://lnstagram-helping.live/11285315522v9lia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5f15859-bcea-4fdf-996a-964cf30f56b9/what_planets_are_visible_tonight_in_ohio.pdfIn PDF document text
    • http://wujedulagux.rf.gd/idsa_pneumonia_guidelines.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_f8550eda579b409fa1533eff0dc01874.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_8795c72cdfab4b24812644ad4f0cb728.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfed0412-f08c-4ea9-97f0-3ca70da666ba/what_does_bene_gesserit_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962dc3b6-a6ba-4b69-9962-4cc9cb9c334c/how_to_screen_mirror_iphone_6_to_vizio_tv.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_c48504e3b1c7414983ebf373641a70b7.pdf?index=trueIn PDF document text
    • http://gamadajizi.rf.gd/bizagi_mac_free.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_off000173c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173C3 5496 bytes
SHA-256: 3b814cb3da41fcd1698afdc37c7d488b59b60be0f5e47fa6e480d2345f9b164b
font_01_sfnt_off0001868c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1868C 14172 bytes
SHA-256: 60148149559410d57bef638ebb9973260bd470dc1ec2714b1ac2fa3af2fd7592

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