Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32a0d2894783594…

MALICIOUS

PDF

75.7 KB Created: 2021-08-05 01:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8cdba1608bd99d91b39684ab21fe206 SHA-1: af2eb21c5c0d7d1a73f346530a45a13d240c16be SHA-256: b32a0d289478359450ba1d6949094b012d4db305a9373c620c0c2b4416a2b348
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous PDFs hosted on compromised websites, suggesting a phishing or malware distribution campaign. The presence of these links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/ac6f0110f62dd7723e0a0fd499a11806/kilukelabokiguxovape.pdf
    • http://vipnjl.com/userfiles/files/91901493479.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/46dcc5da47bfbbbf167566c8824aa502/89034702327.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6d4643b062---vuritupaxudunedatoze.pdf
    • http://juha.be/_files/file/93503635654.pdf
    • https://babamore.com/upload/ckfinder_temp/files/20210530034405.pdf
    • http://eurogeographyjournal.eu/admin/fckfiles/file/67135278162.pdf
    • http://www.pattyn360.com/upload/forum/files/91821023968.pdf
    • http://helderlive.nl/ckfinder/userfiles/files/sotin.pdf
    • http://dok-vo.ru/userfiles/file/mesososex.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aae47cf2a5---75953697945.pdf
    • http://deccanquest.com/konadnew/userfiles/file/81740973292.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/504d377789d09f5e6c7cfe1d7eba4b60/7509179636.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/08929f48532ea54da03abe77d7956e16/judiwomugiben.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768bb4ca209---bijonafipo.pdf
    • http://sowa-architekci.pl/userfiles/files/botulijitomufikuw.pdf
    • http://rococosofa.com/files/files/20140509444.pdf
    • http://cartonwrappingmachine.com/userfiles/file/vuwuraketodexidubaka.pdf
    • http://lesmashclub.com/imgUpload/files/21985500420.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/3c420b0fb515bfa26ccf211c7be37ce7/40206557293.pdf
    • https://rosettes.it/userfiles/file/tetiwisapilazokuxamuro.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/984b5ee853a7e754c06d22031b1f70e6/lenomivazipaluzewitojewul.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a9d0b889c---fafawiwojotobavelibuzugox.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/71413009033.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=find+the+exact+value+of+each+trigonometric+function+worksheet+answers
    • 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_off0000c542.bin
b8a37a9ae5c2d9b0019bb2c4476edf4c2ee29b1c7edfed0880236433f54e2cab
pdf-font-stream PDF embedded font (sfnt) at offset 0xC542 11344 bytes
font_01_sfnt_off0000dfa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 16792 bytes
font_02_sfnt_off0000f7b2.bin
4779c793651e8f84ef8525d1d5ca6425f9298a44bdf8c6b0dfe327c8167edb2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B2 15632 bytes