Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d49026d41c686f…

MALICIOUS

PDF

95.4 KB Created: 2021-07-23 21:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 373e3671225132908b69734648eaaa3b SHA-1: 0fc7ef5116525a050ca6a46a6d009fdc30e5821d SHA-256: 05d49026d41c686f4830e735bb53f452beb6cfe45cc6b7d8bee8bae69055c676
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, while some are marked benign, contribute to the overall pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://www.serenissimaservizi.com//files/73346447571.pdf
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/68713903862.pdf
    • https://watertorens.nl/userfiles/file/gazaguneterizedowimiludu.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f25fc6b9628---37114962225.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/lokrc5ihuars88jc3pipsgsaf3/rerarogolo.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/pram116t5f4n581mimv10kuf1l/97259733996.pdf
    • https://thietbiotoviet.com/Images_upload/files/zineru.pdf
    • http://chiangmai-clean.com/user_img/files/24711878097.pdf
    • https://xn--mietkndigungsrecht-best-gpc.de/userfiles/file/10713254334.pdf
    • http://libertyquad72.fr/userfiles/file/fudaragelozizomud.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf1e525546---81828955644.pdf
    • http://luingpyrex.cz/foto/Image/file/69424037792.pdf
    • https://drvishweshwari.in/userfiles/file/popasiledulumanuriras.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16080d3420feaf---76894520628.pdf
    • https://aedwea.com/upload/foto/mivirijivumuzexeg.pdf
    • http://izumrud38.com/ckfinder/userfiles/files/xibomu.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8752c07f74---pekatolaxakodakadolal.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/c4ltnibn7bvb7apnopm4u4ukae/69641594595.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/c3j8k97t04qkc3d4pci4sq8a94/lubekosegamowisoze.pdf
    • http://tsradviseurs.nl/mailing/images/photo/file/42313904385.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/uoiae4o4f0bvtshqmne0hj6tu6/lagidasepovazasujapotip.pdf
    • http://scan3dsaigon.com/upload/files/99032836412.pdf
    • http://biancoacolori.it/userfiles/files/66424178479.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a10016a0---72735711401.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=wonder+full+movie+with+english+subtitles+watch+online+free+hd
    • http://e1pl2.nazwa.pl/busy/fotki/file/veloluvekinanirozuri.pdf
    • 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_off00010e34.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E34 16792 bytes
font_01_sfnt_off0001264b.bin
47fbeffe9aaa56c48cf35b5365ac4a477065ae32498fa6d78741b795a6308957
pdf-font-stream PDF embedded font (sfnt) at offset 0x1264B 11308 bytes
font_02_sfnt_off00014083.bin
fb173774244a8423d014a0d922d0a91303030236080fa4217dc87f093af96b93
pdf-font-stream PDF embedded font (sfnt) at offset 0x14083 16956 bytes