Malicious PDF — malware analysis report

Static analysis result for SHA-256 469747ddf3f11240…

MALICIOUS

PDF

79.9 KB Created: 2021-09-07 06:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8b58765211271a85f5f5efa118634117 SHA-1: c664b2e169d26c21f9dc66921d689fa27a34cd30 SHA-256: 469747ddf3f1124020660cb44c71475343105516ebb2b27cd83bb756083b0ef1
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user away from the document to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://adria-ex.com/images/blog//file/78524752331.pdf In PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096386294828---guxigeziluxutilowaxob.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/fukenolukalafaxudaripu.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/botabobedenagomoliw.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073e04241582---47525708714.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/76840044079.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pivevuxiso.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/pedesebi.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/8275923947.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210608_B742B8158184CD35.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/kivovowolonu.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/wugug.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/77d4ca5513bfdd0cffb8ba004be6cc49/kotatarot.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/84326672631.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/palebitadarozanepar.pdfIn PDF document text
    • https://stvorki.ru/files/file/bujuruwefuropot.pdfIn PDF document text
    • http://dhs1959reunion.com/clients/871764/File/duxopekidokevojonog.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/94641575741.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9e27ce7a---lagidu.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/78243615345.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/gitufudabox.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/jewebavojaromezideli.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/65020245102.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c467ccc0907---sovegixe.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/kixagale.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/16326719701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=miniso+bluetooth+earphones+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_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B8 15928 bytes
SHA-256: b49de7db26b461747a8edab560b0963611a6709869d5524539cfde9525c56aa7
font_02_sfnt_off000119a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A8 10748 bytes
SHA-256: a9a1353040ecd989a9917b5115980bb981e4a22db44253462895f27ee80fac2a

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