Malicious PDF — malware analysis report

Static analysis result for SHA-256 f456172b7b73aae5…

MALICIOUS

PDF

133.3 KB Created: 2021-07-05 21:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa1e94716fddbf16f83a86f713448450 SHA-1: dd3c7e5bdd0eb7e54c8c0b752667de1a663f8172 SHA-256: f456172b7b73aae57863ab040f0479970408938db41b209d395b6b22a4549b0b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, functioning as a link farm. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9669

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://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/1370a0cb96b182f8920eed7454cf6493/farimulavejazokujonaj.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a83931349fa---nawogoj.pdf
    • http://cfacgroup.com/uploads/FCK_files/file/97268773609.pdf
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/43513453814.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/30bcc2bd3719b587bd83b288ce5fb6a5/70069047424.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a90686d539c---xekorozutukepuzelifa.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/r9floth0r7m5m6m90sb6bpr1uc/81260780214.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a085a5d77de---sexupuxebevukeb.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16070ee21bae7c---8416702900.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/761fa0d18cb7945ebf095c66a9cec809/71485473908.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/4a991cae86d632c5f39a23402235b413/86293971861.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ad5d3727---9045483102.pdf
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/lazaxemefap.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8a1e1cc4---17894918014.pdf
    • http://cuboni.com/uploadfile/hong202106230457399060.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609286aed8e74---sawidukilisorifupetiteluk.pdf
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f92aa2cfe6---24922293026.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b744847122---jetudojeje.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076772b41667---kodorimarexubu.pdf
    • http://muzeumostrowiec.pl/obrazy/file/2855229633.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f0bb9e9a2---sirumekumetevimizimero.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/pcaqqhcoekkir8fj8dn6pm81mg/xagegowosemob.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160761f413f259---totasijanudeja.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/93fcf452b65856ad16655483c99b3863/41968499563.pdf
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/jokupo.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e6a97350aa3ec3d693f501a21b1aa595/zofegeserovuvova.pdf
    • http://hanasushipickup.com/uploads/files/15852190443.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=physical+science+1109+answer+key
    • 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_off0001a81f.bin
0db0704a8cd04b8b3a6866134a1d57a3527e75f9cc96df99f1bcf39818c3e1a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A81F 17688 bytes
font_01_sfnt_off0001d6c2.bin
548a4e09b6d541ff63e36e1539b12cb50170d830e05d05d3a7a6418478f315ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6C2 10744 bytes
font_02_sfnt_off0001ef90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF90 16792 bytes