Malicious PDF — malware analysis report

Static analysis result for SHA-256 484a4f4690343513…

MALICIOUS

PDF

84.3 KB Created: 2021-08-19 16:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6473db73bf3e9f36fd5811e71a8e4838 SHA-1: 5fcbd0798251a0cf6f98198a2b3f426fdbc51bc1 SHA-256: 484a4f4690343513f8ad8d2d4830c16d67acc60e143b1bee4f90af112fe9107d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://amadesafar.ir/basefile/amadesafarir/files/42332614760.pdf In PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/40250006376.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/1d8bbcf235988816acc290765d1e3fbc/15196735101.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/tevakeguji.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/mozedaji.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/2qcajuguasdq57ihgobmo2fkdo/32287118132.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/batopezujexu.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4267eadf9---65517983479.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/2956b6dde87c200e77d396038138938a/gupawetamapiweziz.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/kaweri.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/pixarukirevixigiviravo.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/pusominu.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/joxiroxalugoxisuferoj.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/60567731270.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/pk6tod3a7opjq2s8n41p4nu909/61304625397.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/63886826594.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/rixanido.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/vepefezulizo.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/zevokipo.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/3ae3jlbfbnnlo25c7nvt4ro4dj/13671433926.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816771f0766---sejalefod.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/gigepuzuvumoburuvoz.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1aa19b79a0---lokisiwamogoxafaloxavej.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/89347841535.pdfIn PDF document text
    • https://menu2uplus.com/images/file/dotipowafop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=definicion+de+salud+publica+segun+winslow+1920PDF 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_off0000e26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 17396 bytes
SHA-256: de2734e1c2d5b59ae631e39226b2d743651946c2f884875ca866f3c70de3bb45
font_02_sfnt_off00012664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12664 11388 bytes
SHA-256: 91bb033c1be6cd2dbcc263334583165bd31d2c66a19726bcfadebad42892ca17