Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a2a7b700d7a17f…

MALICIOUS

PDF

75.2 KB Created: 2021-09-20 15:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1ba95821980756580702bad4735e3761 SHA-1: 4846279725b532322c0fee2ce0674751fd8e2540 SHA-256: 26a2a7b700d7a17f23a55908b536f974bf4f428c5a57a5e9ba8b5b76c272965c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised or disposable domains. The presence of multiple external URIs and a link farm structure suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://geelaboba.dswip.com/ci/userfiles/files/kusekijomafulolufituwu.pdf In PDF document text
    • https://tatsolarlight.com/uploads/files/68944833671.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/kj6ltgrmhvbkv2lpehtjtu9u60/52287553515.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/tapiwanifa.pdfIn PDF document text
    • https://12shio1.com/contents/files/25331706177.pdfIn PDF document text
    • http://tzsunup.com/upload/96610378169.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/59297980233.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/15798177255.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/mmtg3buiu546u63umbeqmhav60/kuludepuxax.pdfIn PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/zobajameredefokipape.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/lisatetegofidiruwagidabok.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/zilotokulu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b29a34915---6879730198.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/65242983497.pdfIn PDF document text
    • http://naturalfurnish.com/userfiles/file/xopamesuge.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/mifodiladolupixegonajol.pdfIn PDF document text
    • https://paintingwithapassion.com/nbloom/fckuploads/file/jagudamigudaz.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/3296437539.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/7932409256.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/42704665272.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/78429922018.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/2154d8b444a8d9eba0c979ca31138e60/79127205989.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=change+font+style+in+android+studioPDF 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_off0000c0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D3 10880 bytes
SHA-256: 64fe86705ff374fc3fd04e93bc8862efcf9f8cba03d5087c88023e7d9d48e276
font_01_sfnt_off0000d9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 17600 bytes
SHA-256: cd9b52ea39e1977771609c519166decf8cc195c0104d20525310cac408142bf3
font_02_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1