Malicious PDF — malware analysis report

Static analysis result for SHA-256 6320d39118deeb43…

MALICIOUS

PDF

80.1 KB Created: 2021-09-19 06:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5fffd46245152c9535b1e2b475ac3671 SHA-1: da7caf30da4ab976572eb013aa654d0d4ed65b87 SHA-256: 6320d39118deeb43ca51021f3dca267d90477729b910d30578b6a1e9c853d03b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to lure users to download potentially unwanted or malicious applications. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guravivifoxufuzexatun.pdf In PDF document text
    • http://maremania.net/img_pagine/file/jetoga.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/161417103db8e4---lekukazupegusuvi.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/lejemekijexebowoda.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/sawurovadojeliwudomebo.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/zevosuzu.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/patilasi.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/satubifud.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/fikonadubapoz.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/17447821896.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/vuwepuju.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/h8qp4foh2q2picenulnadd8c2t/vibidigupisupobosewogalav.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/vezetutivewumuxufazoru.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/23325246225.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/1265f0e48f643532facf9c77d25d77b6/virexukusosanoniwosokaf.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/jonakanoton.pdfIn PDF document text
    • http://phutungvespaco.com/luutru/files/89667055541.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/37405470505.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/84797047724.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/34615572906.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091903113373499.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/vanavumevekugopusan.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21894418292.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/56a8770a2b54e0278f0a0f5c025d7f39/41881480228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=bet+win+apk+downloadPDF 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_off0000d615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 10348 bytes
SHA-256: 491c432d42375050dac06054fad0657430c96f35e2c773a2ce6063480164ee3f
font_01_sfnt_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 17584 bytes
SHA-256: 496c33dc36f06046493a5609d83a8eef6663243625bee31f905ead14b9315ed9

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