Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe5d281f3d9e9ce…

MALICIOUS

PDF

93.0 KB Created: 2021-06-27 20:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dde8992082b4276798ca65950dacf580 SHA-1: 0e8f5f9c0be8973d93ab27ee46061d69f7a1aa8a SHA-256: afe5d281f3d9e9ceb175df2eedb3d8f3ab53ef978c7f6acff3bc86a07b3f7f01
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. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The PDF structure and embedded URLs are consistent with a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5f228c04323e765e27102fdaccf12ad5/96305203011.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/58f6abb79a51ec14c756c498bbb704c0/wibijebirogopuxu.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/jhqfrebcr64l735o8001fsi0pc/puregaxatixarined.pdf
    • http://bulgankhangai.mn/userfiles/files/vomef.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a78a7d3c89b---10368848090.pdf
    • http://newcastlehigh1967-50threunion.com/clients/43248/File/33833001874.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/13c841fb6f74b9b2f4ea2d5b8f7107e8/29415783979.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/da64e258b78d33899372262d504c03b7/mavizipegukawomobalemude.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f223b033b---fulivinoviwebukip.pdf
    • http://www.derbysignandgraphics.com/uploads/file/sewoponubekesotij.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/e0nl4959snmf1an5nf6utac8h6/29922175551.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940d7172775---finewabipimafuditetobuwob.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/f51e80ea9e7ab6e6ab6c22caad468432/pizerunarisutal.pdf
    • https://cavalier-hundezucht.ch/userfiles/file/79870151692.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/b6ae07627a2ee3a0ab924d9b41e782b1/25604660986.pdf
    • http://businessvaluationapp.com//fck_files/file/lozukepodoza.pdf
    • https://damiel.eu/userfiles/file/50569552841.pdf
    • http://adance0112.com/upfile/editor/file/6701658780.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfcb202937---jufeboxobawi.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9542c9be6c---89237833786.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/507cc54d694ddee9711b7882bc065477/50045227139.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/vb7bdesr0tmsm8hnhuklg0de4h/gezopopavujeveset.pdf
    • http://learnazia.com/fck/imagesfile/misupudeba.pdf
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/1rncuvpavrh77lr1lf3a5b0mqo/solulotanomu.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeed0e7b97---40242173482.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/28c2e04632e76cf67bc9947240ee1411/52235310587.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=different+types+of+analog+modulation
    • 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_off0001050a.bin
5e6554b051417a31ccd16037b295575b5fb991cb30a4b10904325a58783a58a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1050A 18200 bytes
font_01_sfnt_off000134f4.bin
0a581d630b1706e52188773501f8f1d8d3eec81789a1b5ed2b61b26b28589074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134F4 11056 bytes
font_02_sfnt_off00014e8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8A 16792 bytes

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