Malicious PDF — malware analysis report

Static analysis result for SHA-256 393200e26add2829…

MALICIOUS

PDF

87.7 KB Created: 2021-07-05 23:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa307fd452f4978fa85facc964118bc7 SHA-1: a120dc1a2b7357c85ccd72ef887c0a023069d09a SHA-256: 393200e26add28292c4dd41bc85fce55b553db7d146e38f0a477a3997c1de28d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=dr+phil+wife+net+worth
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/17a5d42e5b21721a99a3b28007e60fa3/88506253639.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/0ebmbrnfmaq1noojenovealmfq/69414019737.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/c71455a2068d19ac0be7d6ee3a0725d8/fasovogor.pdf
    • https://styliststudios.com/imagesTE/file/nonudasibokerubit.pdf
    • http://diysmart.net/userfiles/file/46578630800.pdf
    • https://newtop-eg.com/userfiles/file/podugopatokiratarubiwosi.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abb1e31ff5d---89550450269.pdf
    • https://datatech-int.com/userfiles/file/19392032358.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606c733fe072c---woruz.pdf
    • https://securitydm.rs/slicice/file/18500305906.pdf
    • http://yfatc.com/userfiles/file/85323419943.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bac86828ef---povesujanewi.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160838e0557006---vakuvomeguviwolunitene.pdf
    • http://breakevenpoint.pl/uploads/editor/file/lagivakedapi.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbbf427e1a---lupotixixukuwemazix.pdf
    • http://sillajen.com/fckeditor/_upload/file/28495338963.pdf
    • https://advance-pack.com/editor_upload/file/36557100176.pdf
    • https://mebelihome.ru/upload_picture/80759576737.pdf
    • https://baxsporthorses.com/userfiles/file/jotosifetidewado.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5919dd36b2---tuxebikebefoxesorufi.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/af753ba1d06f6caf8f32d905e2e173d2/89744989969.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/6de79c821a9fcd84bf9121deda3ce51d/23777889194.pdf
    • http://auxerretv.com/content/public/file/64734040615.pdf
    • http://ibookingkr.com/FileData/ckfinder/files/20210705_96452C1A990027F6.pdf
    • https://laetitiabernard.fr/images/file/jazojogisexifasofofuzu.pdf
    • 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_off0000f46a.bin
e178546daeb9496518a23b33657d82cb422557bf087b30c92ef5afa65e610d26
pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 10212 bytes
font_01_sfnt_off00010b3d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3D 16792 bytes
font_02_sfnt_off0001234f.bin
380c3ee076f6a821f0a4272d5c682c01d7d3572db030cf49c2f37826b9c88973
pdf-font-stream PDF embedded font (sfnt) at offset 0x1234F 17512 bytes