Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb0756d68981ed6…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 02:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6f2e28c5672100e3210b66e9b2835f94 SHA-1: 30b47139dfda5eb3c8b4e0cf6280ddd3d1858d1f SHA-256: 9cb0756d68981ed689de20258f1fff9b4dc4c29a2fb179b1556fb5383e677537
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious sites, and the PDF structure suggests it's part of a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate malicious redirects or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://manenshop.com/upload/files/rewogiki.pdf In PDF document text
    • http://dtpokebar.com/uploads/files/51216464246.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/42470011414.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/51652576833.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/wonodup.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210901/files/20210901130618.pdfIn PDF document text
    • http://newshop.jp/archive/file/55277957532.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/19145262275.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/retaf.pdfIn PDF document text
    • http://recviem.ru/img/upload/sufawulagedepevazepero.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/letefavupe.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/26096186722.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/wefigudutolufewopetinekeb.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/7509548976.pdfIn PDF document text
    • https://dintek.eu/uploads/file/wemirimibupijamanesopenab.pdfIn PDF document text
    • https://ises.smithpressautomation.com/phpsites/vertical_living/uploads/file/72839855042.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/tonabegudasenumuvid.pdfIn PDF document text
    • https://ksuskalology.com/images/file/77030177989.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/vonov.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614231516cf4d---rajixowotewopizajufutu.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/weburonekamolagunesizineb.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/23260188283.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/vikulimetonetan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+walking+dead+season+10+episode+1+123moviesPDF 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_off0000afd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E5 14636 bytes
SHA-256: a1556686c3bd1a2211c0a2682c9731f44d67a33200ec90c235745b7080d5722f
font_02_sfnt_off0000ec2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2E 11316 bytes
SHA-256: 2a95b20de2333c5a510549ef77d9aa1a2e800de9a78e7b796a030cb86c06320f