Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3c402a8d279bf6…

MALICIOUS

PDF

92.1 KB Created: 2021-06-30 08:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5dd75ccd4e4e84ea557be3aae7baa65d SHA-1: b68a28c2e510207a4efb22b46c416a4643c43fdd SHA-256: cd3c402a8d279bf6713ade3fb4acb1e01684d005dd905f636a12965986207765
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farms pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links indicate an attempt to redirect users to malicious content, likely as part of a spearphishing attachment delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://oniceh.ru/uplcv?utm_term=how+long+to+heat+up+bagel+bites+in+microwave
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/jqcfv33d9s5aglovqrafet03ft/43945471491.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/qu86eavf9tel5mn0kq682hesn2/60918099824.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076868cba4f5---vosimazovafewirewaketebes.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/mv4o4s4aqbgnno7niaqq7venjm/jevibikoxenolimonenudu.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/80b00a23ec1daadc6297a49d5ac24867/vofesojorunuwilebulimadom.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/6f76a150a11d02a80ad2d4ee853a41a0/7987901361.pdf
    • http://akademibt.com/resimler/files/zifejifopusirasamapuwiga.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982f53ee576---80638889695.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b564a958fd6---nokexa.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/xudunola.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/nexalobokax.pdf
    • https://scanclean.bg/upload/ckfinder/files/sazawira.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b849ae617d7---lewokib.pdf
    • http://renovator.cz/files/file/wixibeketenopozilazokuga.pdf
    • http://www.kickcommerce.com/userfiles/file/xujisom.pdf
    • https://gizaviation.com/uploads/files/musotitimeluronus.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41f368868d---mufenebupi.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/sautmehgagg5c732v0hi421vh6/42464172613.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5dd2a6a4a---25547583088.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/cq8thp40477kju99970m1rmn14/72310561524.pdf
    • https://thefencedocumentary.com/adminfiles/file/74267031634.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/80113ca00ea774977253652408e5564a/jasurogujukiwiniw.pdf
    • https://dewalt-naradi.cz/media/upload/editor/file/rawojozufasifokobigoxe.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/48666239460.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/6d1f13da3b2de032c3bd5dddfc055b89/dogaxibavikixu.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/c197246c5ade8a610f06445978bae16e/xemexozov.pdf
    • http://bilmatbasim.com/userfiles/file/22851070692.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_off0000ff03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF03 16792 bytes
font_01_sfnt_off0001171a.bin
9f6f13f4efab8f52ee0587317322b916df074b17d36f76f8853cbe70084529d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1171A 11204 bytes
font_02_sfnt_off000130f0.bin
1e4c970a236b03e21a5e59fe07161d870fd9fc5246c8ff5df44274f05c26f2e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F0 18860 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.