Malicious PDF — malware analysis report

Static analysis result for SHA-256 b769a2998fbc2e62…

MALICIOUS

PDF

67.5 KB Created: 2021-09-17 05:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 04f6d9d924e6b606f06592f09e1d2c92 SHA-1: 282d6d6d90acb4ed2baf413c8f893fbaea4401c5 SHA-256: b769a2998fbc2e62f6adae66b7097248aeac6b6434d91686f94b7f642c08848e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable links. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide an action trigger. Multiple URLs are present, including one pointing to a raw IP address, suggesting an attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the nature of the PDF and its embedded URIs strongly suggest it's designed to lead users to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://2rent.gr/userfiles/file/xobirosagale.pdf In PDF document text
    • http://timnhanhonline.vn/upload/files/fujodedalibu.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/43019294498.pdfIn PDF document text
    • https://paramourpourbebe.bettygagne.ca/userfiles/file/gaxotinutet.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/susabiwezikakisogatori.pdfIn PDF document text
    • http://kustari.net/userfiles/file/90111288062.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/jaxate.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/titogigazi.pdfPDF link annotation
    • https://termofriz.rs/files/medixi.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/zalimexikirozadobe.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/66457930637.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/gererudadewemi.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/6293098631.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/76131168278.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/woxitozaviwokubuwivoxu.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/37361957142.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/77506998352.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/bidogarilujogipetifesigaj.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/48528638333.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/bebun.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/1605072727613de20b430b1.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/85994353313.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/jikebujoguzarojemo.pdfIn PDF document text
    • http://wmasgroup.com/userfiles/file/2839307575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=fanny+hill+pdf+free+downloadPDF 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_off0000acbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CF 14384 bytes
SHA-256: 57665fac7219a7d4a047b78bbdd067a9705d71c68d3eb4f85a56ebd713a0bac3
font_02_sfnt_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 10508 bytes
SHA-256: ac6add5dd44f19efec6d38f75283aabde9c777e880dfa42a3cac0027d5326a09

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