Malicious PDF — malware analysis report

Static analysis result for SHA-256 489fc160184383f0…

MALICIOUS

PDF

85.7 KB Created: 2021-08-01 05:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b17c9367636f5a567ced29063ee8985 SHA-1: fee017345525ac67f06bef46a79d52011f0aad4d SHA-256: 489fc160184383f00e2f6c3251db6c221c011f29696616a6f3741e1ecc4ec458
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The presence of numerous external URIs and link farm heuristics suggests it directs users to potentially harmful websites. The compromised CMS upload links further indicate a pattern of hosting malicious content on legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://inwebjor.ru/uplcv?utm_term=how+to+find+a+name+on+a+cell+phone+number+for+free PDF link annotation
    • http://fluitec.fr/ressource/site-image/files/wazalodejasubabu.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b3a1b9178---sukapenamim.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/0fcd0d08af67ae55790e3c4c89f39b5b/50682997125.pdfIn PDF document text
    • http://turnyras.lt/Files/file/63439582141.pdfIn PDF document text
    • http://nusamulticentralestari.com/Uploads/userfiles/files/22600760070.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/taviranadodiso.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/85035323922.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf40917f6c---21874148148.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/repirivikajutijulidozaza.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f0b233751---16347325594.pdfIn PDF document text
    • http://abpaluso.com/upload/file/defod.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609063fbb1cfe---vemedo.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///11734280189.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cb2c96215---26645604417.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/nupomidisakubonugi.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/85430065251.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/levajuxivovefakexarolage.pdfIn PDF document text
    • https://kristinanamaste.eu/files/16471474406.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608adeea7517b---46909250661.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-30/20210630220719350719.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608235702c95b---51617471809.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/32215446853.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/fufiwow.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/0922cff19b9c8da8a1b4d1a86f93b8c8/jalumuzilawumoparog.pdfIn PDF document text
    • 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_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 16964 bytes
SHA-256: be75ad5d8bb1292ccb14f801a6f783381833c78206b048df031f1c6aabc71687
font_01_sfnt_off00011666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11666 11036 bytes
SHA-256: d91100bba2a6e3e82d93eeb929076f8aae67411d0a8aba19c58b2d879a452bc5
font_02_sfnt_off00012f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.