Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a246c5399a96105…

MALICIOUS

PDF

79.3 KB Created: 2021-06-30 12:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5061e1662a80efb42611bd994cb9768b SHA-1: 20a3b9cea14222424d216b3d0644fcb068d8d62a SHA-256: 7a246c5399a96105ac1b4222406818d498d65e14a359c8a579a0b14171e96292
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=getting+drunk+in+the+mansions+with+you
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/261d9dad32ae61567ef3f8e504c37f62/84775900745.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a726f8b4ea---gilokedij.pdf
    • https://vishalahospitality.com/ckfinder/userfiles/files/wopaju.pdf
    • http://qca.ch/userfiles/file/pagezedesajulesubukib.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609414d3a2247---zibibufolitogagovokedi.pdf
    • http://chinahongji.com/d/files/7815873441.pdf
    • http://akinmedical.com/uploads/file/dejepidofolevazepimaganaj.pdf
    • http://daisytalavera.com/userfiles/files/59966662206.pdf
    • http://157.230.241.115/image/upload/File/6938567498.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/fbf4153dcd8fdfc54d1e7da2485d68aa/42870381579.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f852789fa---28573646817.pdf
    • http://chaitraglaze.com/uploads/2389582389.pdf
    • http://brooklynsmokeshops.com/admin/images/file/pelip.pdf
    • http://nw-line.ru/generic/uploaded/fedaj.pdf
    • http://bloomx.com/sites/all/sites/bloomx.com/files/wulebukawazi.pdf
    • http://icsbc.ru/fuploader//file/25288627328.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/75ff6df265b283d82b5d66d8ddc28bc3/fegogagiri.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/25705c94ccc03da2bc12cc41f9b64b50/xiwibukazudalomotox.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/9500b8f80cbb2dc512ad01e4a7df9ba8/bomus.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e811d428b9---tufawirafuwewowutiza.pdf
    • http://tutaylamhet.com/storage/ckfinder/files/34390463884.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/bn06414l9f5eajp4ujvnl5rag6/faladajejanol.pdf
    • https://tabs.ultimate-guitar.com/tab/lil-peep/haunt-u-chords-2427805
    • 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_off0000d170.bin
3d4fbc2a4779d7243569d590b9012424c51c71a7761391ccfb7b5bdfe315a0d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD170 11080 bytes
font_01_sfnt_off0000eaff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFF 16792 bytes
font_02_sfnt_off00010311.bin
5ffcbde065f4b9fa1226d4b80ea264acac3da287100f13f78ea68e1716a15499
pdf-font-stream PDF embedded font (sfnt) at offset 0x10311 17232 bytes