Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa5f0f101699040…

MALICIOUS

PDF

68.9 KB Created: 2021-09-25 16:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ff7651d1395dba666653d9c4ea7eda1e SHA-1: d6aa132972d1a12454489db32d99a771336bec97 SHA-256: aaa5f0f101699040540fa0b9bdead7e7906ddd2d3fcb51682870a5e1cbfd91b9
176 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The PDF_IMAGE_LURE heuristic indicates it contains an image designed to trick users into clicking a link, which is further supported by numerous embedded URLs pointing to potentially compromised websites. The document's structure and the presence of multiple external links suggest an attempt to redirect users to malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://daaeportrett.no/upload/file/nixojigado.pdf In PDF document text
    • http://esrafisek.com/images_upload/files/rigilarinurafufozaveduf.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/najikil.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/28776488060.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/3b1698f504a6d932bd740d2d7047763b/bepomoxaro.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210903_085228.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/12365339034.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6f03ea581---10294464144.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/fozewotobaxofakiga.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210919012324-sawawevezi.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/37713971386.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16135195b776a5---vivatazalapipajipoviwo.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/nodiwi.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/31291672540.pdfIn PDF document text
    • https://ayurmitra.com/files/file/64905321463.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/97358700601.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/mapiwijiwakiraguj.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/66310544343.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/64989158573.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/mibizovekizizipud.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/cbeaa795c762c509c41381314f4115d2/kupoxametoxevaze.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/dudejagagotixokeg.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/pobezurumazunofobabus.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/44134989427.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/86738388495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=a+small+car+2+unblockedPDF link annotation
    • 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_off0000b102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB102 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC919 10772 bytes
SHA-256: a238c99bb6f8320b3646bc7ea03a8b5a011861605563cd2c172b7627b7cffbe4
font_02_sfnt_off0000e1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F0 14452 bytes
SHA-256: feb3140d4b1a7245bc3b47a4aa89d720eb4193b13f123780fbd4b2be22f47e16