Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e6ee1fe8a0534f…

MALICIOUS

PDF

79.7 KB Created: 2021-09-23 02:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5f3120455caa24bddb0273a5928b531a SHA-1: 5036334597cb88bf0e1cde6851e3019ab0370686 SHA-256: 29e6ee1fe8a0534f392060f32132c91f7dafb02203d5c11f9aea1e6f71c5e650
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/78724039562.pdf In PDF document text
    • http://areopag-group.ru/sites/default/files/uploads/mubukabedeliv.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/70717516777.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/347ad27beb6702796838a75c4a59fd8f/moferugasamiz.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/72237841961.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/42395776869.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/19f001d2b9ec670eef846437681dccb4/pamogikumujimabat.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/kumipubutenu.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/zuvezabu.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/kagiwu.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/pidiboruperalajib.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614879f83b15a---xinojewife.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/12/file/fopufademozaxuxedokoz.pdfIn PDF document text
    • https://robertbah.si/files/file/77657907245.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/13929855419.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/zefovalowipivekuzufip.pdfIn PDF document text
    • http://kechengchem.com/upload/files/85999456112.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/77509691437.pdfIn PDF document text
    • https://greenfins-thailand.org/uploads/file/kadotezineda.pdfIn PDF document text
    • https://promoform.coreform.it/uploads/file/90995961739.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/ponukis.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/zozegimomo.pdfIn PDF document text
    • https://masihpt1.com/contents/files/6645147716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=oddworld+stranger%27s+wrath+android+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_off0000d1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AC 10672 bytes
SHA-256: d63b9cb77a3ce92dcf5bffe353e7bef570a5ab93bda545dca6a3b76a525a173e
font_01_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 17948 bytes
SHA-256: bc5d6bdd693d92d60bc628e1124d91a9ea71b0a2143f04d0144dd7676e5ceaab
font_02_sfnt_off000118b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1