Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2352a90986d7b37…

MALICIOUS

PDF

80.1 KB Created: 2021-09-09 17:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0f62dbba942b81b64b050677dcea8a58 SHA-1: 4175d25ec6b5b6a14948716fa775db4ba5775153 SHA-256: f2352a90986d7b379dc156747b601178d0e98e06cdb4ae2bcc67932e443ef56b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to disposable domains and configured as a link farm, suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://besteva.com/upload/files/tutideraletowevi.pdf In PDF document text
    • https://siemreaptraveltours.com/userfiles/file/joledovizel.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/fezoxojomisuvapu.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/7864954198.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/45979147065.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/37676286732.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/lutukilafelo.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/sumivogupuwikuzowem.pdfIn PDF document text
    • http://africareview.in/userfiles/file/luwemavowekomozip.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/pezedemovutalozelimeva.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/vigisibura.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/33193900167.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeb4d39b59---56426267738.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/t4gdti0aq0id7flbodo80rfcnf/14819268948.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/sodujilorusik.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/tutigunugipusifolok.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/jilipidewiwulesanamode.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/56384877079.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/zapazanodugutotinafokuxuz.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/todosofurutapejatetuwemen.pdfIn PDF document text
    • http://innotack.com/userfiles/file/gusokituwarowemusab.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/59862842513.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/doxafamopitatu.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109021718476429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=mmd+on+androidPDF 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_off0000d693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 9960 bytes
SHA-256: 801e9fd9597d54e7abd554393e5628acc93d8ed6e63fe40511c205964263e5ea
font_01_sfnt_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 17880 bytes
SHA-256: 80bcaa860ed9a2e0aa11922a810e1622ed7fa686dda2fc91c557df5cd9db3890
font_02_sfnt_off00011aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1