Malicious PDF — malware analysis report

Static analysis result for SHA-256 601da60b5bc62b59…

MALICIOUS

PDF

75.3 KB Created: 2021-09-18 17:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ea38e6d1efee0de7bae77c72a3ed9f85 SHA-1: cd2e86ff36cc05413ab216b82ad9af979a849ad0 SHA-256: 601da60b5bc62b59c5bb51bb927f750ef2eea8c81155b53d879db0f06dd39da1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm hosted on disposable domains and compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URLs point to a lure-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://elistaprezentow.pl/userfiles/file/19639217475.pdf In PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614556d9825e4---lunosarezunutosuwejus.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/72844207487.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/47811675975.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/mozumusidosizirajapabi.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/5b1161b6ddc5a84a073c625a8218c728/tofemajozepedejuzabi.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/61220245606.pdfIn PDF document text
    • http://brukbet.com/user_images/file/56344677455.pdfIn PDF document text
    • http://vo23.ru/upload/file/664421163.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/pakipovizenapozewobatajif.pdfIn PDF document text
    • http://word.mn/uploads/assets/rekunisavasuzu.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/89321040370.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/dorovekuxip.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/54553466534.pdfIn PDF document text
    • http://regmac.net/userfiles/files/55179753056.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/juxifajikaju.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zopikazewezabufifu.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/zajawawelatixibilarogam.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/1437852029.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/68454124728.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/mafaraxusipavozake.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/40243242300.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/keguwasukomezo.pdfIn PDF document text
    • http://winso.tw/userfiles/file/92050650582.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1614393f743b78---jafoxelerajexifokiget.pdfIn PDF document text
    • https://renetravel.ro/images/files/zisumadejurim.pdfIn PDF document text
    • http://confidence-ist.com/ckfinder/userfiles/files/37490330353.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=super+smash+flash+2+download+androidPDF 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_off0000c3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB7 16408 bytes
SHA-256: 6720649b5ab80134648584f812d228c9b449e18afc1850d19687bef32605703c
font_02_sfnt_off000105ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AB 11044 bytes
SHA-256: 0d502656ec7ec9382e90192af646e6677bc10f99df89a9401086d304ad9cc13b

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