Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f12fd140c5caf5…

MALICIOUS

PDF

82.6 KB Created: 2021-09-14 10:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c91279c0a7c3af40cf2d0346b171c4f3 SHA-1: 34d00fc64637344e61cb93e36865c8bf602757dc SHA-256: e8f12fd140c5caf566a17285f7c72ffe2c664f4a59a6d8f8daf1d11fa6dae729
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the structure and URI patterns are consistent with PDF-based exploitation or redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://lasanisports.com/files/lavigalak.pdf In PDF document text
    • https://electroagro.es/pub/files/4674330785.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/vapogikewejil.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/9167136647.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/betufogatopoxepivasuxeg.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/81498720155.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/69543010393.pdfPDF link annotation
    • http://grupposcorcia.it/userfiles/files/45272013498.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/51293157760.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/gasawimepuro.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/33635400263.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613205af00b95---munumozupo.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/fetelamitarakegijolo.pdfIn PDF document text
    • https://mayersoffice.com/userfiles/file/toxopa.pdfIn PDF document text
    • http://tfforming.ru/d/files/golevekimipubag.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5a0301607---9890521007.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/jopibik.pdfIn PDF document text
    • https://davnosti.ru/upload/97719381224.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e7ed3796eb878a508faca090716aedf5/zenuluvojiwefuda.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/85904869187.pdfIn PDF document text
    • http://ossokahve.com/upload/file/batibuvigadazuweseful.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/pegigodemakadegowuxam.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/92865409383.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/munanumatilenufad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=android+nfc+copy+access+cardPDF 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_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 19932 bytes
SHA-256: 9569c1b48e169ab840699763c4b2833ece60e28a2d434a5d2eb7ffdf1d676fd3
font_01_sfnt_off00010c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7C 10564 bytes
SHA-256: cb63326cb08dc7cefce5bcec87bbed9a70e6664896923ac9df484acc61e19421
font_02_sfnt_off000124b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1