Malicious PDF — malware analysis report

Static analysis result for SHA-256 116c00581315f717…

MALICIOUS

PDF

86.5 KB Created: 2021-09-17 15:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9db9839294d2b8a1576b1c9ac4d2df1b SHA-1: f57d0ab4d9674fff6bf88e7f185c4100cb25872e SHA-256: 116c00581315f717908510b796aee8f0ef99c01279364638a9ca2ccaac38d29d
176 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a 'Macro/content-enable lure' heuristic indicates the document likely attempts to trick the user into enabling malicious content. Several URLs point to compromised CMS upload storage, suggesting the PDF may serve as a dropper or redirect to a malicious payload hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/lodis.pdf
    • http://daiichibus.vn/uploads/news_file/vebozigedidopega.pdf
    • https://cbdc.co/uploads/ckfinder/userfiles/files/xegigeriduwu.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/582acfeef2c1c59032f844dd5fd56f4d/79961979565.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca855d09cd---vokulojixujikitewuxu.pdf
    • http://smwiarus.pl/ckfinder/userfiles/files/sakedura.pdf
    • http://yjeverspeed.com/userfiles/file/gexunigidejage.pdf
    • http://tongrentangthai.com/UserFiles/file/45114501250.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/5ba4531542ed22d13acc74ede883f26d/9339894671.pdf
    • http://circuitvietnamcambodge.com/hinhanh/file/godosawov.pdf
    • https://mondoaudio.it/img/uploaded/file/64859187148.pdf
    • http://ambvetsanprospero.eu/userfiles/files/53934937073.pdf
    • http://a1-automotivegroup.com/upload/files/zaledurobojo.pdf
    • http://tulga.ru/editor/files/xaxubirizunuwejulaxunok.pdf
    • http://makesrealsense.com/ckfinder/userfiles/files/pijufore.pdf
    • http://nwatchonline.info/userfiles/file/voreworelez.pdf
    • http://gruppocreta.com/userfiles/files/faxotijutalunofozuvaruban.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/23fac7033706e8e10e1bf69fcd9935c9/rewajujaguzazodariku.pdf
    • http://bensonlandscape.com/editorData/file/82969547561.pdf
    • http://www.sandipmallick.com/fckimages/file/83389852177.pdf
    • http://matraholding.hu/images/userfiles/files/tupexo.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f89207e138---duvigibezuwutodu.pdf
    • https://aymsoft.us/aym_image/files/88953104204.pdf
    • https://akapacha.com/userfiles/file/87762897190.pdf
    • http://kodemari.info/data/files/9120641447.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+install+flutter+sdk+in+android+studio
    • 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_off0000ee17.bin
69daa43b471af745773bba5423436082d474d3b1bb2cd18a3c5b28a4597ce541
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE17 17832 bytes
font_01_sfnt_off00011b87.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B87 16792 bytes
font_02_sfnt_off0001339e.bin
474fa31ba487e6bc22336560c33ff3188d03c8147554fb69e4eb9230d6330858
pdf-font-stream PDF embedded font (sfnt) at offset 0x1339E 10616 bytes