Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ad69371b982b2c…

MALICIOUS

PDF

94.1 KB Created: 2021-07-04 04:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23761b9abe297a067be4f9fd33d0b7cf SHA-1: f95e4d85adfed0ee8003932334e91e9d4f1d4795 SHA-256: 69ad69371b982b2cf2503fe85d9face39e4fef842c2c6b53454deef1305a954e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://infrive.ru/uplcv?utm_term=how+to+put+pdf+on+iphone
    • http://asijskepotraviny.cz/files/file/34435551518.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/22adc343e69e3c4c04c0bb1868118179/44286591245.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rgqr018hdnq0afc65aco9uggm0/32834278974.pdf
    • http://txextremecarts.com/userfiles/file/pamomejovixudumoxepafirir.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/5301e612a87510d8d9b2b1579aa88343/66250750048.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8932f13da27e8541371a20c8e2a778a4/pawezigofodit.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/ff17b3c97fb76b2040e5d823e9298d02/24427223604.pdf
    • http://yachtandgulet.com/userfiles/file/tamivaxetilimipep.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/76d2e074a1b9527671daf58898f20144/33584449625.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/546b1c2b07aba51e701354100cd4909b/48701328600.pdf
    • http://sunrui-ti.com/d/files/volodemuwifunixukiwififi.pdf
    • http://atreve.eu/ubezpiecz/obrazy/file/9230628235.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/356114a5340f6c7f0b45e70f7c3ae2b8/gobirotaxazigo.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6fa890e32---woworer.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/sp3ln86q8aha193vsmlhfc8g57/18942770586.pdf
    • http://dobrasekacka.cz/userfiles/file/60408882322.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160758565a055f---57797035690.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079564ca279f---50967321806.pdf
    • https://cottingham-group.com/cufiles/files/nawusixopagodexisako.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/eg9m49rq54vt8m3engolj7m3o3/korugegenuburijajeletax.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/5d806e7f5a613e890bcd379287defba9/36151512678.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b2c58d33b0643ccfc75279ac426798ca/zurarutonaxuxipexeb.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094164fb04bc---bilagiweb.pdf
    • http://adamlegal.com/userfiles/file/75889057862.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_off00010e5e.bin
4755d91b8dd10617b2aa14e065ea9fc31e32d1fdb1a3f9d068fd5fdcf1ec230d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5E 17580 bytes
font_01_sfnt_off00013c27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C27 16792 bytes
font_02_sfnt_off0001543e.bin
5c03f670d7cd18c1aebea79917bd637353ec779fa2ef3c7532bdf05a88d5a111
pdf-font-stream PDF embedded font (sfnt) at offset 0x1543E 10296 bytes