Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea8d74580283d2d…

MALICIOUS

PDF

85.9 KB Created: 2021-07-20 04:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c195ce26cf37da0d52e946fed1e36022 SHA-1: 9260ba044eb6ea84febee3df8f6ed6e5301cf107 SHA-256: 1ea8d74580283d2d591b53f310f61d2da36608f6dfb39e9499b9d5e18b21e6bb
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://expertsystemgroup.com/file_media/file_image/file/rutimobibojo.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/21d32e64f23bd292b31a449a650d87b1/85690680380.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94f9691222---ridasopixosago.pdf
    • http://lateonsettay-sachs.org/userfiles/file/mifimukopedow.pdf
    • http://promador.pl/userfiles/file/dakorogejojewudiwokaxijem.pdf
    • http://phuwangnam.com/user_file/file/bumotekobuzutixififixe.pdf
    • http://melly-incendie.fr/img_db/zasevazisibigazin.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606eed7a89088---tuwofanis.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e95d606693---36457502505.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/70389ca589fa1055cf49eb0a59fee06c/nojakaj.pdf
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/piwexepuvuvu.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/d9525566f9f47ee5d99d66f07b5c371b/19849731763.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/de948906dd97c2cd2ccf03fc571a2e98/95224326726.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d75f7a24d95---ribusufoduribetiwuzal.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba353736ce---lerijuzimejujeponolox.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcb8228544---44398852110.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/78ef5f8f4077a1196ee0253ec84bd289/tesanituwupepubirenug.pdf
    • http://bitite.lv/media/txt/122/file/pujilefapuledofenum.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b62d642ad---mikeladevumolokomezo.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97ef81d30---jeroxodedovapipu.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608140719367a---70065601226.pdf
    • http://hoangle.vn/uploads/userfiles/file/87586471667.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/b65a5d23900cbad4cbd434a1603c0a79/rufumogedizarorurodomaw.pdf
    • http://janatalnajaf.com/basefile/janatalnajafcom/files/wejolilakururile.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a2ccb1eb37483f17d6e4a41dbda58e57/luduvikedukun.pdf
    • https://digicpictures.com/downloads/gizusewis.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=i+hope+things+are+going+well+on+your+end
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • 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_off0000f346.bin
44165133fe18d019632628a4ff7fd817b557a84ee88319211a2d570ab9acab4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 16964 bytes
font_01_sfnt_off00011f4c.bin
60c1fe9be15dae1f88e5241a8254569eaf9e13959507868baf12f9f0e6156439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 10920 bytes
font_02_sfnt_off00013866.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13866 16792 bytes

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