Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64711de0e345b10…

MALICIOUS

PDF

67.8 KB Created: 2021-10-01 12:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2c7a99fd9b30a7b192429858cca79dfe SHA-1: 28a13113b621dffedc108dd2eff7376b242f040a SHA-256: f64711de0e345b10b295f50fb56145ca6e294c63869bc521630611de8d075905
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an embedded URL that redirects to a page with a 'cancel ongoing download' parameter, suggesting a deceptive download or phishing attempt. The document's structure and numerous external links point towards a link farm used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=cancel+ongoing+download+android PDF link annotation
    • https://tmtteks.com/files/zifotasusikezoberela.pdfIn PDF document text
    • https://ptogel2.com/contents/files/zovetafinotaperezoseseses.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/tufadulej.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/83052373326.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/3834509498.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/nomuvamezebomanes.pdfIn PDF document text
    • http://konberdbio.com/upload/files/jixuroxanid.pdfIn PDF document text
    • http://proficlim.ru/public/userfiles/file/84050436953.pdfIn PDF document text
    • http://abc-tel.ru/data/File/73750459386.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nugogirafuvigeduwazo.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/66712255872.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/015281648bf6cc69e84c6a8130359fd8/temezoxagenela.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210917164553.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/88964404239.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/vixugorebunu.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/2487216520.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/kagoxexifinopexivefim.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/zogapojusejewizixid.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/pomukapaj.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/delerubuzinepadatav.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/79155987092.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/270903004507.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0dedbf085a8097609197ebe7ba4277e9/xufetomiduduvorogu.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_off0000b072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB072 10396 bytes
SHA-256: 4448dc2ad48d3dff124b9c5d03f8e5f9794f4acd8bb3b32678f8fdae7fad15c7
font_01_sfnt_off0000c7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E6 13552 bytes
SHA-256: c075c306ab802ed6554dcabf146cce585a813f7aa1f6dd35194f3c22847d1e06
font_02_sfnt_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1