Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06bee21c010a8ca…

MALICIOUS

PDF

78.0 KB Created: 2021-09-06 01:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dfe2c92c93bc9952cdad2a94d008934d SHA-1: ecab915c447c72794eb0606161270c28449896ca SHA-256: f06bee21c010a8ca68fc31ef90fade1a8ea0593774f9b1b6f8eb3e9f3d62284e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple PDF files hosted on various domains, many of which appear to be disposable or compromised. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure suggests a phishing attempt to deliver a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://peptidturkiye.com/ckfinder/userfiles/files/38460484705.pdf In PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c566966697c---vevavevibivupugejun.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/pijobo.pdfIn PDF document text
    • https://onwater.my/uploads/file/72116311474.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ce4f0497d---sofepodorosiralixesu.pdfIn PDF document text
    • http://badgerhillfarm.uk/lifijofuzigawegunobu.pdfIn PDF document text
    • http://hydrem.ru/images/file/kawodikipakemabu.pdfIn PDF document text
    • http://nebo52.ru/uploads/files/kowobizewu.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/sorijevamitikumovugijux.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/labonalirobaxelesisejo.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/vurakewubogifa.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f31929b5635---59142286265.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160820af8092c0---nivipu.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/33233593829.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/najodotomazukozadesarab.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/v732923mm0enooj56u9egti9kd/sikuweru.pdfIn PDF document text
    • http://aweibel.com/Photo/file/27850286493.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/mafajomemorubinaduj.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/38928538885.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/xowadugamagubezonuza.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d136e0a24d---49803107089.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f70b6074b---gujidam.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/05823d393f87748d6a2cad0f0a83c4d2/53120560098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=gateway+medicaid+provider+manualPDF 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_off0000c5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBE 20096 bytes
SHA-256: c8c4e4823a836e36ced6a3ffa7d155212d2262e4a94fa2234c7e160f462a8df1
font_02_sfnt_off000110d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 10912 bytes
SHA-256: d4f3071b291f48af4d084c4b2c1fa093c990c876e7f2703c1b6e831b4d77497b

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