Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b805685e467010a…

MALICIOUS

PDF

97.0 KB Created: 2021-06-25 19:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be54ac19d017b2df4c1704977a9f8e4a SHA-1: 61d6aa5376ce473f75d7cbcffae28d7c7a000087 SHA-256: 7b805685e467010ae21fb140c43def6b27bc01dc3b67be08babb8baf882ce27b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites hosting other PDF files. These links are likely intended to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d1f6567ed---xefebazisusew.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608be0bcb437b---2623004669.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e93a162b1f0faa725666927cf6278d88/90681653900.pdf
    • http://aeronautike.com/userfiles/file/figot.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d00a5d8f52c8461de19e2b12b4a25026/82764404505.pdf
    • http://mamam.by/upload/File/file/44242215940.pdf
    • https://motacademy.it/file/bimixeruvex.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/3b0spolgnsne0m5foudt5daj8c/52388193331.pdf
    • http://softwarefactory.nl/images/file/11785990040.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe813841c0---sejabubewomikaperuxuj.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087308661910---kaxod.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e10deca8d---xosinolexoworesodi.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a53da0495a0---lanupoxowuwizadunumix.pdf
    • http://starrwindow.com/clients/863399/File/nokuguka.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098432a073b5---kebobuninedejakopumu.pdf
    • https://aprilboya.com/userfiles/file/rokifedutomesipifukaxik.pdf
    • http://reguitti-engineering.it/userfiles/files/38004788637.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/89341573622.pdf
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/kefagijedofegekovorubor.pdf
    • http://habitat3.eu/userfiles/files/67412982629.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082086b8511b---paneguvi.pdf
    • https://istanajp2.com/contents//files/20722481782.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b330dd3657a---20617638107.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b93a32e9cf---lesegatawenulabusi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=richest+people+of+all+time
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011808.bin
c1b4c32ba860137064fdad9edd71fab8b1c098cc9a7ba838be0de6052be184cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11808 17884 bytes
font_01_sfnt_off0001466c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1466C 16792 bytes
font_02_sfnt_off00015e83.bin
75e4c734e8bec3b610e8c518467157d239743a5c47bab7370171796f436d3345
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E83 10584 bytes