Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccf1175139b91a4…

MALICIOUS

PDF

83.8 KB Created: 2021-08-17 04:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29b2ad7fcb13e9e6cdc1429206217152 SHA-1: ba7d103ed1d9373326a567e2198870018b7d2e71 SHA-256: 0ccf1175139b91a4e1dc9ef7066e3947c35a149980c63d07fe7132bfe7673669
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress sites, likely intended to host malicious files or redirect users to phishing pages. While no scripts were directly extracted, the nature of the link farm suggests an intent to deliver a secondary payload or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/fedcea5f038fe3682ad0a2c0a936315b/befiwutalerosobawe.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/a133c0ad169eafaf49abc285c633eef0/gurirew.pdf
    • http://pampa.be/uploads/userfiles/files/47934757677.pdf
    • https://nasikampung.info/contents/files/sopojupevu.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c363f459484---36726186288.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/1c9ace426d340336d4a70ede11e00939/tofijojubaziwifevibudip.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c6583b64472---bagozabisenagetupese.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ccb9f7c39e94f56a7f708866331dd720/xadufapimu.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607014248bdea---kunujorofibesiz.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16083764b3836e---6962890978.pdf
    • https://vivekanandbawwa.com/userfiles/file/73728401430.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16107edc4d9646---tipafosifamam.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2259eb2778---73663242916.pdf
    • https://bawaniint.com/ckfinder/userfiles/files/40798559645.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16119e3b2c5671---vutogujuvakusexuzupob.pdf
    • https://maximatrimony.com/ckfinder/userfiles/files/47893454367.pdf
    • http://hnspkjx.com/d/files/badop.pdf
    • http://cn-junsheng.com/upload/file///20217365545556.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/56eedae1851ed1d75e3d4910bd75c1cb/zejekinox.pdf
    • https://seikai.jp/free_images/files/37708092317.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077a848ef12a---44679294955.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071bfe90edb8---fasazotetemosi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+play+age+of+empires+2+multiplayer+offline
    • 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_off0000e2ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 16792 bytes
font_01_sfnt_off0000fafc.bin
27247928b1ee543f91d8a356f6606f56bc6b8191687708b6f0f275882081783e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 16696 bytes
font_02_sfnt_off0001263e.bin
ca4f1a28c313d8675f96a8de791e1c27bc70e709631a10addbd78232c7981690
pdf-font-stream PDF embedded font (sfnt) at offset 0x1263E 11112 bytes