Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a1d1ce9a5f8fff…

MALICIOUS

PDF

78.0 KB Created: 2021-03-22 21:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3871d71d88cae39eefc0d7bec3d967e SHA-1: 7b49c93999d8bb511aba2f845ede560d7b284410 SHA-256: d2a1d1ce9a5f8fff80641e2b59da11dd150f5ca8767cc758bd51ed69032022bf
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://jumiwimov.ru/wix?keyword=power+bi+resume+linkedin
    • https://static.s123-cdn-static.com/uploads/4497356/normal_5fcf253ed7af6.pdf
    • https://cdn.sqhk.co/xekutenupi/Lijgfic/university_of_miami_football_score_clemson.pdf
    • https://cdn.sqhk.co/rumobotituda/87r9jeH/jimovowagubumivij.pdf
    • https://cdn.sqhk.co/tawibonikigo/LpUjfYe/zapidukifi.pdf
    • http://babusokojanog.sportsontheweb.net/1376476799.pdf
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5fd84111a3037.pdf
    • https://cdn-cms.f-static.net/uploads/4448116/normal_6011ab19011e8.pdf
    • http://wawesoja.sportsontheweb.net/39529296233.pdf
    • https://cdn-cms.f-static.net/uploads/4462345/normal_5fda631e1053d.pdf
    • http://maleev.online/surah_mulk_translation_in_english_and_urdut1s6a.pdf
    • https://cdn.sqhk.co/jemitaso/iheaggT/square_bird_game_free_online.pdf
    • http://tuzogat.sportsontheweb.net/89258467337.pdf
    • https://cdn-cms.f-static.net/uploads/4387933/normal_5fd7fb1115c5d.pdf
    • http://voicebftyi.com/30153907618f34sh.pdf
    • https://cdn.sqhk.co/zefinotobi/iiRjelT/43771815537.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_e8e63d6c245f42bf8910bf6278ddf33b.pdf?index=true
    • http://fetekovabu.onlinewebshop.net/room_on_the_broom_download_free.pdf
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_9891f89313ac4aedb5c04ebbf896c286.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e5afccba-0af5-4f89-80ed-7e097e4ab95b/love_story_movie_telugu_songs_download.pdf
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_3f88f1f251044f81b7aa15adc58c1378.pdf?index=true
    • https://uploads.strikinglycdn.com/files/08c57683-24c3-48ce-bc2c-63983915bdcb/76390324149.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce0.bin
5c2dc668cb2139facd6ef9129f2b308bace347d04198a777d338b0d91184df40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE0 5060 bytes
font_01_sfnt_off0000ee0f.bin
92fd5ddf6453e23e5a143ada320a459f10aa1da5c1680fa64d21f3762e79371d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 10984 bytes
font_02_sfnt_off0001139e.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1139E 16204 bytes

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