Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6e08250cb7c664…

MALICIOUS

PDF

67.5 KB Created: 2021-09-27 20:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b837a893a50c949e7ede9817eb8c0585 SHA-1: f86564c9dc3639072ab6b61ccb718b69710077c7 SHA-256: 9b6e08250cb7c664cb4e2a66a99ed49111e80342767c0b169639e9611cf7ce74
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF utilizes an image-only lure, a common tactic for phishing or malware delivery. It contains multiple embedded URLs, with one specifically pointing to a suspicious domain that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=monster+house+full+movie+123movies PDF link annotation
    • http://mertcelikkapi.com/userfiles/file/xobazomiwunonimizuzol.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/gunipodorapeko.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/serojifeponovon.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/43893569897.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/rexavukopam.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150bcc34b4b8---xodoverogevirukozemawej.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/zodofojimobulepafalewixug.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/98266183819.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/rupaxoliwopu.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/bafebojejazobagi.pdfIn PDF document text
    • https://fotografski-studio.kost.si/userfiles/file/61041987690.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/zaxaxotimanuparakuf.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/38110570916.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/60138241931.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/63610724376.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/fopibijudidino.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/pefilugupajilegi.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/biwevodazuwudufiw.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/gureraledugati.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/jilozagadul.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/worekevomakiga.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/7a6349b0d27ef78bc5f27788455c9115/datedagovevexufakusi.pdfIn PDF document text
    • http://s250801404.onlinehome.fr/img/uploaded/file/nuwuzarerusukudiwepu.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_off0000ada4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA4 13772 bytes
SHA-256: 6d8283399390de75664dc404d16001ead11400c8116c16bd9d4291c7552b354d
font_01_sfnt_off0000cfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DB 10820 bytes
SHA-256: c2d2a221554925ad524100a592dd234a59f28feeb6109f1ed327fc3f05e34e4e