Malicious PDF — malware analysis report

Static analysis result for SHA-256 386337b34caf162f…

MALICIOUS

PDF

88.8 KB Created: 2021-10-07 09:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 029dee9cd60236846f60a44945606209 SHA-1: 18852f81e555fa52234cd3b1dc70ddac30ab9c6e SHA-256: 386337b34caf162f018f8427a286d7090bb93a730cf9e0efd58bb05080e38f20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users into clicking and potentially downloading further malicious content or submitting sensitive information. No scripts were extracted from this sample, but the presence of multiple external URIs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=ace+of+wands+tarot+yes+or+no
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141d9ea7495c---xupozudifolojadesake.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161408261d79e8---54500903252.pdf
    • http://archgeo-leszno.pl/uploads/userfiles/files/puzakofafekodakake.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/69c606d473bde8d2d8a60f3870cce0c2/busudujekopiredejivet.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/p9mmrnebcltubvg670ov42c534/60427513786.pdf
    • https://nada70.org/userfiles/file/pumuburobovafuninepu.pdf
    • http://eaupureinternational.com/userfiles/file/74134200859.pdf
    • http://uhy-th.com/image/upload/files/34106290377.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b73f9d5ee6---81896929843.pdf
    • http://chugguwang.com/files/fckeditor/file/88307562323.pdf
    • http://mhzsolutionz.com/userfiles/file/88937394717.pdf
    • https://solener.info/ckfinder/userfiles/files/86206966381.pdf
    • http://bulongvungtau.com/media/ftp/file/8882252703.pdf
    • http://blueyee.com/upload/file/232047412232.pdf
    • http://aerotechgroup.ru/img/outer/files/98576296420.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/g7h2h9ctgnfp90fr9bi64r776i/98507248084.pdf
    • http://lightofislamonair.org/uploads/files/zewanunekisun.pdf
    • http://libertyquad72.fr/userfiles/file/35953547301.pdf
    • http://studiosimonepantaleo.it/userfiles/files/gaxafijijabarepemo.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/8d2aeb28dc3b32394a5763c83ec4d895/sexoxerimuz.pdf
    • http://kccmaul.com/files/files/mopixel.pdf
    • http://bayernglobal.de/userVZ/file/68958065784.pdf
    • http://speckrepeg.by/UserFiles/files/gugakawepebupulezawujoniw.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b2da2ce0c0---44966598369.pdf
    • https://eurosan.pl/user_images/file/sasuj.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://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_off0000f3a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 16792 bytes
font_01_sfnt_off00010bbc.bin
f1d782e03079099505849212e8270de89de9d88ccdbc7edf641561051ca3c884
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 10512 bytes
font_02_sfnt_off000123f2.bin
cfeb1d98b371d75f364f42f50ce6170aa9fed8cfa8369de528026103053cf5a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x123F2 19532 bytes