Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abcc34b82a1ae43…

MALICIOUS

PDF

76.6 KB Created: 2021-09-30 10:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 76310057261446f877c9698ecff316f4 SHA-1: 86ff2d252a419f76581355923e1cd7bab374ed34 SHA-256: 1abcc34b82a1ae43db51f11acba4f42f4cba5de4c55b0f187fe04ac69b131239
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, embedding a large number of URLs, many of which point to disposable or unknown hosting. This suggests an attempt to direct users to malicious sites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ateliergermain.net/sites/default/files/file/tuwad.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155651b6f8ce---85308713931.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e68cd3c528---julonevubusixexunuxali.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/28264102959.pdfIn PDF document text
    • http://hanyuchina.com/upload/files/zogegemapefevuxiwuranajo.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/72124718824.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/nuturare.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/nidusefozekufofa.pdfIn PDF document text
    • http://abpaluso.com/upload/file/sulelirigutaguretunagoval.pdfIn PDF document text
    • https://edusfera.pl/upload/file/32560422346.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/mogusogumobarubiwe.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/20287833774.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/dekaxufonatefepaja.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/80704590543.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/rasimu.pdfIn PDF document text
    • http://melvin.cz/data/30377021969.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/75177383138.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/73214413717.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/27699188203.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/45579399825.pdfIn PDF document text
    • http://chinalabware.net/d/files/64361668412.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210907170216_5br5cs.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/98337482173.pdfIn PDF document text
    • http://adanamega.com/userfiles/file/narosim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=dr+driving+game+hack+version+downloadPDF 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_off0000c2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FA 10964 bytes
SHA-256: 4705bd4a7cef1817e56e0105150fa610fbc52bbea2cd785afdf47cac4d45e7d5
font_01_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 18584 bytes
SHA-256: d00004370bc6efee55efe5d741c2c792222912f07c66ca0095e75e3f22cf3f5f
font_02_sfnt_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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