Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e6482138e021ba…

MALICIOUS

PDF

67.0 KB Created: 2021-09-11 09:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a5cf7889166926c8069ef3d69bc2dc3e SHA-1: e6d9ae9392c051f609806aa17008155df5627243 SHA-256: c9e6482138e021ba9b2fb2f0a20a88d501d66277332feab532908cbfab6ac228
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded links pointing to external websites. Heuristics indicate it's designed to trick users into clicking through to compromised CMS uploads and disposable hosting sites. The presence of external URIs and a high ML score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://allytemp.ru/uplcv?utm_term=dna+codon+sequence PDF link annotation
    • http://zafirkort.com/uploads/files/75143571851.pdfIn PDF document text
    • http://winso.tw/userfiles/file/92748733625.pdfIn PDF document text
    • http://alkathirilaw.com/userfiles/files/74623899297.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/guvaget.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/vaxopoxunege.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/dopenipefajevotak.pdfIn PDF document text
    • http://bastola.org/userfiles/file/41254113115.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/38508704342.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/85222215526.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/74345774402.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/97681167501.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/6673465647.pdfIn PDF document text
    • http://kidzcastleschool.com/singhania/downloads/file/fegezonewafokerevutafu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16130c43a9f97c---80023716340.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338ec8389c0---januvifev.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/6526032932.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/pirafaradotux.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/28pd28vo1pdae6nssa7oirons2/popige.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/91208916283.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/muzifomasig.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/94531003649.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/98696426754.pdfIn PDF document text
    • https://simorgh.it/uploads/file/76762182984.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_off0000ace1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE1 10276 bytes
SHA-256: 627b283cc750b2317a25c909a9c90c91500bb48b82f51456c248b96fe056f727
font_01_sfnt_off0000c3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFB 14132 bytes
SHA-256: 88efa4a544cab10b1eb9e2aa724a6675d55e11be2b178d618047540fa8b1436c

Open this report in the interactive analyzer, or submit your own file for analysis.