Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb6f1a8da853b03…

MALICIOUS

PDF

68.5 KB Created: 2021-09-23 19:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b4fe77a5262993c693f9deb888221a76 SHA-1: 13735bdcc0e66f0dedc3098118e937e098187377 SHA-256: eeb6f1a8da853b03638e5eb573c9bad5caaa1d68f00a8ab9a7c7b18aa55d2604
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a screenshot lure, presenting itself as an image to deceive users into interacting with a malicious link. The embedded JavaScript and the high number of algorithmically generated URLs suggest an attempt to download and execute a second-stage payload. The ClamAV detection and ML classifier further confirm its malicious nature, likely serving as a downloader for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://opt-russtd.ru/data_center/upload_pictures/file/didudajesaxiralawapu.pdf In PDF document text
    • http://pusheng168.com/uploadfiles/20210903011533.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/29279687496.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161385fa553d62---58961277591.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/64751988608.pdfIn PDF document text
    • http://koddous.com/userfiles/file/84216903981.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1630815024.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/gotepokilenazatupepud.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16148fab36a9de---85297838832.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/rugelogaxix.pdfIn PDF document text
    • http://vuason.vn/upload/files/tezisavudedewiwoxinowobel.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/xegokepuwerawaluliw.pdfIn PDF document text
    • https://tworaise.com/userfiles/file/basejixak.pdfIn PDF document text
    • https://thomsonindia.com/userfiles/files/8077830811.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/kigesodutuma.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/livuvudabenowoniwogej.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/bijaxuvajajikutajota.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/75209138112.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/89623938601.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/6620684201.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/wejisinazuvaf.pdfIn PDF document text
    • http://besteva.com/upload/files/busirozutawufazepa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=subway+surfers+windows+7+32+bitPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/jubuxumewexumu.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_off0000ae73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68A 11160 bytes
SHA-256: 028e4a2393b65501b365ce219681059d509e359e2f8c6f9a6ae98ee0b339a1e4
font_02_sfnt_off0000e0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F3 14500 bytes
SHA-256: 9ed157394c24bfa7c5f16997cd8ca830762e8f2300ef618ae1cabf0caf6cdc09

Open this report in the interactive analyzer, or submit your own file for analysis.