Malicious PDF — malware analysis report

Static analysis result for SHA-256 d151336747a74439…

MALICIOUS

PDF

107.3 KB Created: 2021-07-07 11:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5cfb9dd34079f1ff077e191b93ffcd72 SHA-1: c7ae783c23887790a6f7e85ba15ebe4d92ee6030 SHA-256: d151336747a7443926bf51a0d34dc8745c129b1ac22eef210115d6bd04a78871
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/556814db8dd583f740a3dd904266829d/82838433875.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd809695b5---dumedovo.pdf
    • http://worldofpacifiers.com/editor_uploads/system/files/44695914592.pdf
    • http://microcement.ua/userfiles/file/31334595820.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/0os8dpjjs0ga7g99m89a2h7225/xidudev.pdf
    • https://pinkrali.com/calisma2/files/uploads/kurukifexid.pdf
    • http://geose.ru/userfiles/file/relejepanipa.pdf
    • http://gardenofsound.com/userfiles/files/xozofisaxefajetiwe.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070f333ab773---suzered.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a109bd77ec3---fijemenapote.pdf
    • http://soupworld.de/upload/file/60115934994.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160895d3a415da---fowotipo.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ecin7ivb2dvmhf0jkl95k03e74/xuralofezafigoviwe.pdf
    • https://adsbudget.net/userfiles/file/8903880381.pdf
    • https://balajihighfields.in/userfiles/file/falijogatoxamol.pdf
    • https://ferado.vn/userfiles/file/43628645905.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eeab3113c---pumawebafufirimebunagi.pdf
    • http://anhuifan.com/upload_fck/file/2021-7-2/20210702174906135797.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/c0c23b679457ae04266f7dd2cd15431b/34589209144.pdf
    • http://huile-de-nigelle.info/userfiles/file/wosirokenomagi.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae20e04c73b---terajigorugetugupuxadog.pdf
    • http://gabortech.com/admin/file/xuvowuzakimosokogodikopi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=opioid+induced+psychosis
    • http://e1pl2.nazwa.pl/busy/fotki/file/10242443056.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123fa.bin
5c5da38a3d5e9436174d828963dfe0d6d8af6ce274069286beb911cc487c4bf5
pdf-font-stream PDF embedded font (sfnt) at offset 0x123FA 8848 bytes
font_01_sfnt_off00014102.bin
0c070f18b33ee5dda30edbeee57c1b3361c9a9c24089b91d814675659610b8c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x14102 18132 bytes
font_02_sfnt_off00016fb4.bin
e759d4de6bb4cb17ee33ff4081804ad49484df2876ff68fbbb5075b2e45564af
pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB4 10444 bytes
font_03_sfnt_off0001875c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1875C 16792 bytes