Malicious PDF — malware analysis report

Static analysis result for SHA-256 8516185019c533a9…

MALICIOUS

PDF

84.2 KB Created: 2021-08-03 23:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 688f9910909cdb06c75e16502cc7b9c1 SHA-1: 0234c40a61c870b0851300c984a8df6339dba624 SHA-256: 8516185019c533a9d90805b97ad3a35e06946d5fe6e312beb809fbeb49330937
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous links to compromised websites and uses a deceptive download button lure. The primary function appears to be directing users to external resources that likely host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=g+m+wallpaper+download+hd PDF link annotation
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f702362df347b82e258fced123f20452/gamarajepebojezesigusi.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/59950594378.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62acbe1cbb---faduwivizidele.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f54dbb4fa---kimotubarezoteperobit.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/41619349785.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9bd4a19a9c6e2c1e91e88dd7d6e8570b/54282647979.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/vovipiz.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/wubosonaze.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/eb865a5cd966b98048c4821a52ce9a81/31379563901.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/av4a3ra15dfjk5pdi16bndmvq2/29842387494.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/tm2r528iqo8b58cshuaf1a3err/80639904744.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/81162843588.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/32191737231.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/8ja254v9vuus5ujjmd9odl27al/41964069445.pdfIn PDF document text
    • http://klinikoral.com/img/userfiles/files/wotibukoxumumetonesanepem.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/vokurefukazinevovevan.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b684fb64c7---17874338614.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/70b63a4d5dc4058ea4579a53ad09146e/zuwofilupunatatipezu.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/1bolcgtlqahu9l0rdmsjpm39hg/53720836700.pdfIn PDF document text
    • http://fpsh1980.com/clients/7/7d/7de5299bd6bdc19cdd6b275c058e9c4a/File/40592370951.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/jivifufa.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_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 10424 bytes
SHA-256: fda58ff28b2c63e7063979d032b6939a63a56cf75b248e9c6ef01b33ffafe80b
font_02_sfnt_off00011710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 16904 bytes
SHA-256: e7490d1aa7f5b0634422dbe61d4e5d71c6640817648726e491ea9a8315599599

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