Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc5ab46fa5a8bfe…

MALICIOUS

PDF

90.8 KB Created: 2021-08-03 22:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 653b429bb22c33e806b2d21147fa676a SHA-1: 25ef8fd76028befde054d6b4330996a1cbfc855a SHA-256: edc5ab46fa5a8bfe9c6196d6b66abec71ca45601aa32289213f7efa3f56d3f80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous external URLs, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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://tokyoto.pl/UserFiles/file/ziwoxebop.pdf In PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/rnhdm05qiq2dge0kkel8kcqo8q/rivet.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/22696676718.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/a4e6ff130733c0ddf7ab61c7ca245bdf/28090704052.pdfIn PDF document text
    • https://33mobility.net/uploads/files/gesixibanukevijazisijux.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160871e6071839---sipid.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/80863305087.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/63ugqimp365h8rbo8s603mniv4/dadegurefapuli.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c09d8d598c---3963168493.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a552c164c---91312489212.pdfIn PDF document text
    • http://sharise.net/Uploadfiles/files/40059973594.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/fitojo.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/35v15akdsd015m1uj0queopv17/58690863975.pdfIn PDF document text
    • http://coumert.com/images/file/78323129710.pdfIn PDF document text
    • http://uco-kampen.com/media/files/milimerikevonor.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/75757119394.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/99689972849.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820132ace7e---nobipaserapeloxal.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/98330501006.pdfIn PDF document text
    • http://northcity.rs/slike/files/82119680755.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607595150082a---69835159347.pdfIn PDF document text
    • http://umiyawoodworks.com/fckdb/userfiles/file/xegolesasoxugi.pdfIn PDF document text
    • https://togeltop.net/contents//files/95063918940.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088c2537334c---22691590713.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f0e00921d3d02b0111d8cc6add1fb18e/suzinaje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=descargar+video+tercer+cielo+yo+te+extra%C3%B1are+letra+acordesPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD858 17004 bytes
SHA-256: 065f649f23a9310fa6640b29ac8c75c02901c7d82a5230c4d6ee0ff60a6431c0
font_01_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 1736 bytes
SHA-256: 917c43d6162fe4415041be1e0d076aede95f0c20961f65668df81e9e9fd08a75
font_02_sfnt_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001104c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104C 18764 bytes
SHA-256: 43cf23297ef38f346f284ab4352bee5ee9a5c451faf35432eecc32344b74b6be
font_04_sfnt_off00014053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14053 10932 bytes
SHA-256: d1f5502820fc5a11d0bc1d3d723cb91771215193a1040141ec164271b4af9700

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