Malicious PDF — malware analysis report

Static analysis result for SHA-256 09502ce96bafbddb…

MALICIOUS

PDF

84.1 KB Created: 2021-07-05 02:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe75ffcd74482020459887897f229be2 SHA-1: 2533a27f45a16cb3105645ccfaaf68f43cf66676 SHA-256: 09502ce96bafbddba8000d1b80cf5103b41d3dbb1c75af11cccaa777a6c24a79
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to lure users to phishing pages or download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/11932ddd7affbee98a7469b55365c9d1/tagab.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/4d917b37cdb1f7053ef2eaf9a86e23e3/bilomemadapotaxusixim.pdf
    • http://akkoryazilim.com/userfiles/file/24373995478.pdf
    • http://msnladyboy.com/ckfinder/userfiles/files/poladaxumatukovavidi.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb91bc0b14---63372568679.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5d4da71d7---mezeguv.pdf
    • http://dogable.de/userfiles/file/99730364344.pdf
    • http://mosjob.ru/images/file/93719596649.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b10f6de9567---kodigekofak.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/e1de043c59c4bac310ba65e4bb12ea64/piziwekuwomug.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/43293c04a0645f6b03050fe88d0fc2a4/wagovi.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/04d8c54097255b50efeafc60365fca6d/pimeredipukarikeworebod.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c805cf4bc---13911310280.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a361d6ab57e---30404035475.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab69dc1b0a7---lazazodefa.pdf
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/5134489560.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a36514ef26d---meboligagijeriz.pdf
    • https://businessservicesuk.com/userfiles/file/fewezosixopizonezilugate.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/4e03bc832adde830855cd77e551c62ec/11570336613.pdf
    • http://aep-tc.com/cache/fck_files/file/tekaretaxal.pdf
    • http://nfc.soo.jp/file/kagikapeboxisez.pdf
    • http://zetrade.cz/userfiles/file/68532653297.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+get+blood+out+of+khakis
    • 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://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_off0000e71b.bin
ff949a6828e59f9c8158bd343224b5d7dc7bd5de4be73893a97335409a88d772
pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 10840 bytes
font_01_sfnt_off00010015.bin
910261997238c3c998edb9e0c9489278e331c16a38848b8ea034c1d3628c1e57
pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 16548 bytes
font_02_sfnt_off00012b11.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B11 16792 bytes