Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05801b0a8620c9c…

MALICIOUS

PDF

95.3 KB Created: 2021-07-03 18:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 666d4ba3a278282b19bcff1a17b15fe7 SHA-1: 9eaf1b3ab289a20385a21641a0482a4d8e85e7c6 SHA-256: d05801b0a8620c9c90c49b05c2e7dd53e8e3cb7a75d08a47b817a9c7c8610f33
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to potentially compromised websites and a heuristic indicating it's a password-protected archive lure. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of PDF_URI and EMBEDDED_URL heuristics suggests potential for malicious JavaScript execution or external resource loading, commonly used in phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://hongdacable.com/d/files/66382241620.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a96839491---raregurupabik.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607af91635bbd---38713239368.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/33704571190.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3d0005871---20402339037.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7c936f789d9b9890c75ef8d2bec48d84/xuteb.pdf
    • http://cloverdiamond.com/file/mogokilibulupowuti.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e631b66c21---23497914282.pdf
    • https://dewalt-naradi.cz/media/upload/editor/file/lebomuwejot.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/5e39e6c74514d5c196fb155fcdecbe70/parukezogobofokiruduk.pdf
    • http://vom-ragnaroek.de/uploads/file/98668777284.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/534fb19dc20e7b9fdd531077ecc5df88/94723701188.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70d2c0ff6e---44868708045.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/312f87693759ff6b9a1479ef46755407/rivela.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/e1f68df2d942ba1ffce7a56c47673fb7/jitajewekezoj.pdf
    • https://simplehome.ro/ckfinder/userfiles/files/mepanaraturogoxixeziduw.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/65ede12eb4a20ee0ba87bd3757bb08d5/xizame.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a26ec22e2c---fojamebur.pdf
    • http://chroscina.com/userfiles/file/22777757661.pdf
    • http://wardwrightself.com/clients/863644/File/52709523304.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/pivuganisafadiganeje.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086670880db3---66805478113.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/450dc4963079258ae19e47dbf39bc065/57056565085.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c15ebb254---23531693832.pdf
    • http://billsky.ee/files/file/tezori.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=italy+st+peter%27s+basilica
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011507.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11507 16792 bytes
font_01_sfnt_off00012d1e.bin
8cb4d3a4e678e8eef6f67a1cb868c97071aba77dababf99530186bbd6534f670
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1E 10380 bytes
font_02_sfnt_off00014496.bin
26cb788f0d4f0fa4e44f46ebfa66ed542480f989bddf0d63feb240a6f272f8aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x14496 16972 bytes