Malicious PDF — malware analysis report

Static analysis result for SHA-256 04674153415f4fb8…

MALICIOUS

PDF

101.9 KB Created: 2021-06-26 00:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3fee094cfbba1b0adeba83f50d5cc330 SHA-1: f8c52f20961d3c6b1bc1965202994fdfca584606 SHA-256: 04674153415f4fb87326a18ddc1389f0b2d29321c23996764a6ccf339c5afb10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. No scripts were extracted, but the structure and URL analysis strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://alphasigmaoverseas.com/userfiles/file/bunelusokigijodadu.pdf
    • https://balbok.net/admin/ckfinder/userfiles/files/83592265094.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609463fce32e0---31311756192.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/2e4342237f6706a8ac302ae654cba248/34319168659.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/2a75030d59a6274d50dbc59534cca411/74067179705.pdf
    • http://daivupaint.com/img-chamthi/files/71132003365.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/v4gmh1dv0t280j3b53hji27ug5/82904278244.pdf
    • http://bjbtrh.com/files/pic/file/gozisufipovazarupuwuniwuv.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/1648a572da1815c2776b611c4a805487/zipixoripaxapib.pdf
    • https://ludifrance.fr/userfiles/file/muzorufom.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/323f5b4db389746b21e709ceda0922d3/ragusejezigup.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a267f4d0cab---mariwodudolenibuwifuf.pdf
    • http://snotlicker.com/clients/10243/File/pasexesozubu.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b89a0be0a---70480586647.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/7e4bab45e903832740c5130a264d35b8/20993811607.pdf
    • http://boathousebrokerage.com/userfiles/file/dovivesamaf.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfea18cc64---84720678835.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d624feba5f0---88915000736.pdf
    • https://bikeid.net/ckfinder/userfiles/files/37883153699.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/sukimilazidu.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f4b8169fe---87689973750.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/42bab9f754db747136791748b64274e7/tobawojebapa.pdf
    • http://goldenpeak.it/userfiles/files/wuxela.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160841dd26430f---65686928051.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/4dacfd25355695fdb3b4117ef3a93499/48982463780.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/p9jrukudcbmmftf15b0qubq366/44844141957.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=foetus+growth+stages
    • 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_off00012c9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9E 16792 bytes
font_01_sfnt_off000144b0.bin
56d9c9659c265e9ef1d2a62c7a92a36e1cca1f8640fe53a40f5ade3da691e54c
pdf-font-stream PDF embedded font (sfnt) at offset 0x144B0 17908 bytes
font_02_sfnt_off0001730a.bin
34517cb44cc1fc36d090abca22eeca0906b18bb2981453968d57176131107b17
pdf-font-stream PDF embedded font (sfnt) at offset 0x1730A 10308 bytes