Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7a688bf6ce9b82…

MALICIOUS

PDF

75.6 KB Created: 2021-09-18 18:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3bda227d7e5156b8bdbb5701b1f4eedd SHA-1: 80e7a822ed37ed3e7e119c70fe2abc81b28f9e35 SHA-256: fc7a688bf6ce9b82c6ecb9bd403fe91051bc0c0bc5a4009ac1da50043fd9fe72
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting. These links likely lead to further malicious content or phishing pages, attempting to trick users into downloading malware or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=evpad+pro+app+store+apk PDF link annotation
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/buvotunilowisasopebido.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/k0gp7g1tcrncmq6i7fke14q6f0/vevolupo.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16136ee55102fc---35418411844.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/pirodogorijodivutuzu.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135085820905---jolugevedupalasaregeraw.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/79693702343.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/xenurifigaki.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/77007987670.pdfIn PDF document text
    • http://fjsxsx558.com/upload/files/71863987935.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612feea7b8c98---jafaturewefikaxizik.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/43546132684.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/42221437903.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202196135349255.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/soburugotubanonizi.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cca8f65516---96997628955.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/zimuxejef.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/96122044879.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/20205670059.pdfIn PDF document text
    • http://qdjshg.com/files/file/zunikipasatubojelazubolu.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/digekamajiva.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/topavuzutanof.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/jexopomobawitezokaruraduj.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/8smahhiu6tcpiid96m69foj581/22217540960.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/pakadipiwaravexukapano.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/98106811465.pdfIn PDF document text
    • 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_off0000bf2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73C 19364 bytes
SHA-256: 38c654d27122f098c7f8dee9c11b3bf10f033d0750970ccb9832544cc2185137
font_02_sfnt_off0001099e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099E 10284 bytes
SHA-256: ae9cfdbd4d258d91922c45b722f1dbc38fb69151141fc3e3253bf33af2b580fc