Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed7ff78d3920023…

MALICIOUS

PDF

87.8 KB Created: 2021-07-01 10:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd3b4f46efa8edb5b8f9359b5930435c SHA-1: 41ca2228f717e73d72ff5fd1d6397bf3c2d588fe SHA-256: bed7ff78d3920023e12beb5c9a8d002d8e814394e426ac9b39135960a47c0d73
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress upload directories. The presence of multiple compromised CMS upload links and disposable hosting indicates a deliberate attempt to obscure the true destination and potentially distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rungrawin-itt.com/userfiles/files/mujagagofirafixukuj.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d4e8c4100---19709015670.pdf
    • http://rollfactorytogo.com/uploads/files/nutegelexokosu.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a304205ceb0---digixeponutoxuparuda.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/gijevemajo.pdf
    • https://weddingitaly.jp/images/file/kibotali.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d5c79cf579c6c29710c2d1fcbf75cb46/69131425264.pdf
    • https://kisikana.hr/userfiles/file/1952428832.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/ik8addjrh5r9dqd095c62mi9s5/46768176682.pdf
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/wowinupusekageruf.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608932e9eb226---81136661206.pdf
    • http://bandenplaats.nl/cmsimages/file/41350901610.pdf
    • https://moto-trend.cz/public/files/fck/file/ruwonojakatidaloku.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/3859e5fe91071b02069ef1f82c2ed1d8/pekuxogexo.pdf
    • http://pensionpoint.cz/userfiles/files/libumusatosu.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/hhveupllodb59a7av5onkodqb3/47899213413.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcca657037d---faporamaw.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/57613773058.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160708a1ec58f0---godozetaroki.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f397bf933---64999864265.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16096b3b520c53---69063481343.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61ec0208d---57293463112.pdf
    • http://domeinbeverdonk.be/assets/files/file/lugaxuxixuwapatonusep.pdf
    • http://anoh.net/pds/userfiles/files/mejanimurupezexakebadak.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078416b47ecf---74163988050.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=still+life+with+cheeses+almonds+and+pretzels
    • 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_off0000f354.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 16792 bytes
font_01_sfnt_off00010b6b.bin
2dddc0150b2d8de7859ba0c0940582013676eac6ad79c35e093fcfdc7940a73c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6B 11108 bytes
font_02_sfnt_off0001252d.bin
a2faa561edf7a6e914a6de07bac7cb02c6dc15160416733db1449a3292048c50
pdf-font-stream PDF embedded font (sfnt) at offset 0x1252D 17120 bytes