Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8fa4b0c2e63b32…

MALICIOUS

PDF

69.5 KB Created: 2021-09-22 12:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 14fcb669cf2e85ad6a76d16ac56d4417 SHA-1: 1dbcd26ae9d18993549e75e050709b6b99185cd2 SHA-256: fa8fa4b0c2e63b329dc1f5dc441f2693ab1515f95ebde36e7bc325921ee8dfb2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's an image-based lure designed to trick users. It contains numerous links to external sites, many hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of external links and the overall structure strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 1 text block(s), carries a click-outward action, and is only 69 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://inwebjor.ru/uplcv?utm_term=share+screen+video+call+android PDF link annotation
    • http://www.cottagegrad.ru/files/file/51971293175.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/55284936580.pdfIn PDF document text
    • https://cicimanis.com/contents/files/niburasidatoxidevo.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/14738076019.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/56fd5a24869bdd9e44d0f98e1bf265a5/43187626185.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/51141566280.pdfIn PDF document text
    • https://rovetco.com/userfiles/file/41759946799.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141cf39a2afe---porinoxu.pdfIn PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/fogiwudiseluwaxowo.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/mupivevijomav.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/85728862889.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109031014573325.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/zivepipujunumedemoxogizi.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/kosuwudoxetalamuvuvavumib.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/32753599631.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/30519596475.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/jilimadodiratejetatesiz.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/boxusawexinisiti.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/60306071765.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/gexunuwixipufif.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/sisozasijufurizabife.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/6gfl1j4magre3p1j6oc1tj0d14/52719226198.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/luxisilexigevo.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376845ab042---19605203576.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/vosixaja.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_off0000b51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51F 14284 bytes
SHA-256: 9634d2f342ffc6701933b39205c99412adcd519d7ac48fea2e0907883ddf324c
font_01_sfnt_off0000d850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD850 10508 bytes
SHA-256: 06f91a834ca0c7a8a6f54e95bba87110bfb7c6cf9d32e597e7304f370d676f86
font_02_sfnt_off0000f023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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