Malicious PDF — malware analysis report

Static analysis result for SHA-256 7250ce2ad1720c19…

MALICIOUS

PDF

69.4 KB Created: 2021-09-11 02:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: de06434eafadc06fc2966e41a31c931d SHA-1: 5e6e9dcdaa25d313920f00b5ae4ad91fab5addc3 SHA-256: 7250ce2ad1720c19ad955881af509370a52f081588d52dcd33e4a6956fc3d780
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 into clicking embedded links. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting a link farm used to redirect victims. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests an attempt to deliver a second-stage payload or phish for credentials.

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 0 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://cengilli.com/icerik_images/file/begesipagawaroloviw.pdf In PDF document text
    • http://warmistore.com/userfiles/file/74520067875.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/67697873554.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/62226124150.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/zoguwodafuxunerogizul.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/19466158316134c47917e5d.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/98986876221.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/vivexusawegus.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/xutabomomidibalino.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/hb7hgae413mc02b1iqsn0vdr64/66314065384.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161367f19cad19---sinofatebogunegefewugizug.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/bifopegexoxaporo.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/5634767333.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/kapupivakezufaboz.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/mezixafarolabesakita.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-4/20210904190210842675.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/58856495852.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/rubuvakupolafun.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b3cce8a1a76f81818667126ddc2c9177/dikobutekige.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/11366219978.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/noruremitugezatoxixamexom.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/kamabujazi.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/lenozikupabopam.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613499c00748e---tajiradodewedu.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/wozanatorisigopopiveji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=jucydate+apk+free+download+for+androidPDF 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_off0000b3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B2 10828 bytes
SHA-256: aa51ca3be3e11dba18e83beadee6be2590cfe2a9e0ed970d9c8a0e983e8d6339
font_01_sfnt_off0000cce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE6 14060 bytes
SHA-256: 873a250e4e37d8cef8379cbccd143f08329f0677971def0998353743bb46371a
font_02_sfnt_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1