Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f7057de9a94631…

MALICIOUS

PDF

93.3 KB Created: 2021-02-15 08:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc294d70da673adfd5afeb8b98fb03f9 SHA-1: d5106670987262ebfc01b168b81bf2e3eb9b186c SHA-256: c1f7057de9a94631adb9d7185bdeb4b9b0f5e449098b0c2b905c6bc252379a69
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'natural cures' and 'free pdfs', aligning with phishing tactics. The presence of external links indicates an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/wix?keyword=over+the+counter+natural+cures+shane+ellison+free+pdf
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/3301727.pdf
    • https://xakowuval.weebly.com/uploads/1/3/5/3/135316831/fabifot.pdf
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/takawogiteb_fivuvulemamij_wekimur_zofomam.pdf
    • https://cdn.sqhk.co/ruzaxube/jiibjcS/2pac_hail_mary_lyrics_meaning.pdf
    • https://bisigategisabuv.weebly.com/uploads/1/3/4/8/134884720/3660883.pdf
    • https://zefokivovemajo.weebly.com/uploads/1/3/0/8/130874141/3555047.pdf
    • https://cdn.sqhk.co/vikimono/gghajeP/troll_face_quest_tv_shows_level_35.pdf
    • https://cdn.sqhk.co/sawibevas/gejiyib/dafuvojur.pdf
    • https://zobimodajozo.weebly.com/uploads/1/3/4/3/134340865/f9d950f4.pdf
    • https://cdn.sqhk.co/botonerepap/j4OuzXh/idle_car_game_hack.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokit/muvibaj.pdf
    • https://s3.amazonaws.com/tupofelasujewas/carburateur_solex_32_bis.pdf
    • https://s3.amazonaws.com/zarelusipofox/57875962599.pdf
    • https://s3.amazonaws.com/baxunaf/93459586526.pdf
    • https://s3.amazonaws.com/zumomasugipeno/bootstrap_login_form_html5.pdf
    • https://s3.amazonaws.com/popilo/big_w_android_tv_box.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_off000119e8.bin
21967c6a05c604521ebf019db4ad4538d10be0738e146f708ff89ce1bcc07345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E8 5332 bytes
font_01_sfnt_off00012c0c.bin
5b66c6492fe4f566a9cc3972df700fcb505d4349fa6bc118b4eaa96f4e5e550b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0C 10904 bytes
font_02_sfnt_off00015197.bin
fdb4199150d2633c77ca78250181459ef7e3ee128e70c49e553cacce45d9491d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15197 16344 bytes

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