Malicious PDF — malware analysis report

Static analysis result for SHA-256 b602b690feb80314…

MALICIOUS

PDF

75.9 KB Created: 2021-09-15 06:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 817411b7461cc6658380fd94b2bf0bba SHA-1: f8c3237a45415fe2bdf5b06d4cf386240f953e47 SHA-256: b602b690feb80314b3a968cb622810d7b2b25407e1a908a062056e54d67602c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=nova+launcher+prime+latest PDF link annotation
    • https://aitalk.vn/upload/files/tawasipogeduxozi.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/93842511706.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/11541526009.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/0e18058aadd59d0bc66ee5eb04a7983d/73447141831.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/97567508984.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1614119c733a7e---82906338109.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/dilarazerasulobaf.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/folexer.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/85632229967.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/97898733896.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/12110518534.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210907_121254.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/8a92dae34fd45f7512abfa01b8172483/94300194544.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/kijelakolopapurojuzipe.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/nokujavuxo.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/xosenasudi.pdfIn PDF document text
    • http://33podarka.ru/pictures/files/fajavonododozafuroxigon.pdfIn PDF document text
    • https://alley.52886.tw/uploads/files/45137394959.pdfIn PDF document text
    • http://gaudi.tw/upload/files/fofojoxibadubazopujan.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/96477635877.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/40297177841.pdfIn PDF document text
    • https://digireg.org/upload/jeluzikobevimuxa.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/waxajajupidixovisipu.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/delejija.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b559d4f4e7---rokunipodup.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_off0000c5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DD 16696 bytes
SHA-256: 7e004e202413496194596477053311b5b949b77b9179f800442d58096beefb77
font_01_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 10784 bytes
SHA-256: dcc3c8e46e1c6846e0858ff0e1eb8f523ef4f75dd1e5ea635a0a675e2e7f2d1f
font_02_sfnt_off000109cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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