Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9914b5619b4e84d…

MALICIOUS

PDF

88.6 KB Created: 2021-07-02 10:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5eccfeb4945064e0d5b68309337cd2d0 SHA-1: b9d3e7824f07bbb6164e414d7dd5da5e4e092567 SHA-256: d9914b5619b4e84d1cb72de47732da4bb5e562bda6ba782744be559cf5dadca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised CMS upload storage, likely intended to trick users into downloading malware disguised as legitimate software. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://lelit.nl/app/webroot/files/userfiles/files/59447184317.pdf
    • http://decaiyun.com/upload/file/210702095942352422xhtty6ifyd94.pdf
    • http://studio-rivetti.it/userfiles/files/vesaregebosexoperof.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bee07f0bd8f---nabobepinupajisidigu.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/80211984706.pdf
    • http://meble-tk.pl/userfiles/file/xamadufelakowa.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/26qqied3tjg7hp0a5folrt8m6r/riduvevuxibudolukuvuf.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/kinidisebiruxeb.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071188d7d6bb.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/00b7b914e1fac95b2b5cbbdaae85b6ce/budekajizaruvawu.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff95473db2---36919925098.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/3frtn9d5rvoo9oi4ssap915sq4/miponejop.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785532d77f9---duzuworakerodikewobovuw.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/7b5d7fef884c6aada4e2eb7aa8332d95/juxenadatefavaje.pdf
    • https://ildiko-szepsegszalon.hu/userfiles/file/gorakotupifogodekad.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/c8ik7a8e9q5tqh5gqs6v8fpeai/19936504632.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/1c78027bff749420edcdcd40f53b737d/jokema.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160828172686be---19618249690.pdf
    • http://mwflower.com/upimagesfile///68904399416.pdf
    • http://poorclarescork.ie/images/3320410769.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/t9j9vsl62oj2nua7vc8na7ibrh/xowaxexepekakapelur.pdf
    • http://thaide.org/userfiles/file/21095928592.pdf
    • http://biolabsrl.org/userfiles/files/momusofozutokidon.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=ccleaner+latest+version+free+download+with+crack
    • 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_off0000f455.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 16792 bytes
font_01_sfnt_off00010c6c.bin
787fac0709bac96425f522c7dba85051e805ba0b1f098d286eb6adc62b01defe
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6C 10848 bytes
font_02_sfnt_off00012580.bin
5de0e03b072fc71926f0f168155517ad39203b18a450e601ce00bf65efc56b07
pdf-font-stream PDF embedded font (sfnt) at offset 0x12580 18216 bytes