Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bbe84b7fa8cf39…

MALICIOUS

PDF

67.8 KB Created: 2021-09-25 12:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f098d01e0541af488553821364fd0d0f SHA-1: c943c1eab6abbe2a672151aa63e9b0901a9039cd SHA-256: 76bbe84b7fa8cf39a94c8586e8046d34a869b2d51ced6d215251a7a07b760ec4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide an action trigger. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malicious download campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 2 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=closing+tabs+on+android+phone PDF link annotation
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/2b7657ad40e94858161aa348f9b885e0/kagelevejuvazofukezumoje.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/xefizuzomasaregi.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/kifuvimoluzoxijugelemumu.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/jejuwadopu.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/ziluwovasejebigomezolux.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/fetulaxaxuluros.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/mututagufigoxalomidokixuf.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/bebudivefadavibikuzew.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/malifi.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/27783210697.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/53463754128.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/doxusulipuwasewob.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/naludutubexekizan.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/67954277094.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/69266249988.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/7298759800.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/tiwofuxutukufogovixoka.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/gepom.pdfIn PDF document text
    • https://wineart.online/userfiles/file/31584613412.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/25791511463.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/kusexibikuzekowuxad.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/ginulavuzubevamo.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/47023689066.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_off0000ad6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC581 14496 bytes
SHA-256: db5f1641bd7b293428607f00f537217788494244b69cc6a3bf3b074fdbd5000f
font_02_sfnt_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 10840 bytes
SHA-256: 928a78e5d7ef215e2b6e47a3d1a6133d2aa1113259558a864249622c7646a964