Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2cc9e566b8cae6…

MALICIOUS

PDF

146.7 KB Created: 2021-07-15 12:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e6502abeee2a0728b073b6378293c2a SHA-1: e8b935a74f4368f693d3dc896535d88e7f4ba539 SHA-256: 9f2cc9e566b8cae6c2ddd049a38799f7410e55f78cbbd1d6be678ee75bb8cf1b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites and other domains, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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=download+lagu+a+thousand+years+part+2
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f332343df9---fabedatiruwomatul.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c872c5c9316---zesitewupenowip.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/89788926106.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16082f6f235160---87185381162.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607557c8b3e38---gugusidivuzutevulipik.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/47a50f2b5bfdc55bbf3410263049851a/telinaxitazofo.pdf
    • http://bagiez.com/userfiles/file/42393909565.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c80bda069---86384195866.pdf
    • http://appinaris.net/ckfinder/userfiles/publics/files/zaseranizenama.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d28f199276---80008511593.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/haossef7ha9m2e4iji9km9h132/12626456022.pdf
    • http://biaikatolikus.hu/files/file/98826152515.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/97837375860.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd3f45920d---sibirulejivemebufamitezex.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/dd3768fa619470bbd0194bbe087f6e97/tugaxirabarazazomozepozo.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6acf716ca---26452755434.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090ee012d51f---87663226651.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f16fd2185---siwasojoruzitejexevotopi.pdf
    • http://sciattella.net/images/file/13770395779.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/9bnc5f20nb6dd7gno02g64v9j0/86492368728.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da995d0d328---56055878279.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f29ba80bd---xasaterorik.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608032be28418---42311109115.pdf
    • http://csc0451.com/userfiles/file/20210627191655_csuz8i.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cd7b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD7B 16792 bytes
font_01_sfnt_off0001e588.bin
184a936bd1ce5dff700adc4e6a12c67a52a21ba3f6bd4f31defed58e18ed8b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E588 1856 bytes
font_02_sfnt_off0001ee2c.bin
3431fdef9f14cd4330395a7c0ea3581cda508285493a878a9db02f8ce4813dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE2C 20952 bytes
font_03_sfnt_off000222d7.bin
255ffb44271f30421a423dccea47ebdd3fde715d5f8154d58a7ac190ac7a7222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x222D7 11000 bytes

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