Malicious PDF — malware analysis report

Static analysis result for SHA-256 a268647173175e08…

MALICIOUS

PDF

67.4 KB Created: 2021-09-19 05:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 401f4691ea069f962caedb5966fe903f SHA-1: c3579018e72773b0045177e2e762d95989cc2763 SHA-256: a268647173175e08cca3c8e28a6c94d55b67350d23fd4cb14965641006a6e31d
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a malicious screenshot lure, designed to trick users into clicking embedded links. Multiple heuristics indicate it's part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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.
  • 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 https://garglob.ru/uplcv?utm_term=download+morrowind+android PDF link annotation
    • http://eqletstalk.com/uploads/files/202109012146525735.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/68158559570.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/92949866032.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/xexon.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/dupovabesesodawewe.pdfIn PDF document text
    • http://kaitianjinghua.cn/admin/userfiles/file/202109130355075134.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210907_101920_130.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021090515151_579074190.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/9136415227.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/15915032304.pdfPDF link annotation
    • https://artlabjo.com/userfiles/file/89577502599.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/52640471761467b05000d8.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/4bafe1980ba693f6d7af108fe2b94831/dulosixonudisuge.pdfIn PDF document text
    • http://baltic-rt.ru/ckfinder/userfiles/files/kobukilupadas.pdfIn PDF document text
    • http://myphamso1.net/uploads/files/tupepiv.pdfIn PDF document text
    • https://razredna-nastava.net/files/92548280237.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1630688568.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/ditapagenuketaxuzog.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/jowikuvelidopuxuvuvoj.pdfIn PDF document text
    • https://agatanorek.com/files/file/80146024625.pdfIn PDF document text
    • http://santeh.md/img/files/betasuril.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_off0000adfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADFE 14184 bytes
SHA-256: fe5b6f33f8d441293cdc2065f9e2557a945dfd282fef690913d3d760cedf72bf
font_01_sfnt_off0000d16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16C 10100 bytes
SHA-256: 9b88c7ff6a4023b3cde709ce1569b5918c0f2209c7c0a902f2d9646413a9c619
font_02_sfnt_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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