Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d4fcfe8a003322…

MALICIOUS

PDF

76.9 KB Created: 2021-08-22 06:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4b9379b0d05daf3ee081f266d16f29ba SHA-1: a863c6aa2727d2a0d3c5763159ca56163a1091a1 SHA-256: 48d4fcfe8a00332212ddf364e29e8ed96626fd4d674b056da4532bdc3c216d10
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to download further malicious content or engage in phishing. No scripts were extracted, and the document body was unreadable, limiting the analysis to the URL structure and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://sriraghavendratemple.com/ckfinder/userfiles/files/bopozosutitovunenev.pdf In PDF document text
    • http://cana.vn/uploads/userfiles/file/19049527871.pdfIn PDF document text
    • http://guowangcable.com/d/files/lokidavepesos.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083c9823f840---62859705305.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/tavuwafupedo.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/51068864079.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/sijiwoliso.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862b2e04a20---kelilisibeveridebugafek.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/341391af3dafa2d88ccdf6d9c6e507c7/8889940443.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a34b671a75---fivafed.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/29366384097.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/zadevanotokusixo.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/bavozur.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/35011160831.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/gaguvarug.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/29320878701.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/rtpg6lscktf2hoo26rspci1gaj/vezubisiviroteporine.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/rdadg3tljvpf7evj6ag19oes3c/78057172525.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edfd9c63a3---noxojepa.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/bejujogipanixijozugetane.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/kedijanikavol.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cbc056102e7025054a2a38fa402f214d/keloboz.pdfIn PDF document text
    • https://italvaping.com/file/42276323123.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=the+amazing+world+of+gumball+season+3+episode+8PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC391 17360 bytes
SHA-256: bdc929bbd3296f6910b3a554e2594dfeb0aa4f77c7bdb62f426d8aa39c6e6bd9
font_01_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AD 11576 bytes
SHA-256: d7d66a197e4a46c3b629a72752b389bebc8a03a84025287f6498d1a08d35096d