Malicious PDF — malware analysis report

Static analysis result for SHA-256 2008350e6eae454e…

MALICIOUS

PDF

79.5 KB Created: 2021-06-28 02:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b743d2c4dd0ce0a6e4085a0dbc6747b SHA-1: 41a6b97edea4f9e4caef1eded088a3d019106a89 SHA-256: 2008350e6eae454ea33f3f8aea64b310bfe21a8fc25c85bbddc9f42cd1f8a33f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c30a0d42c3a---suligasuzevowadotinaluja.pdf
    • http://alibabashipping.com/userfiles/file/dizobanodudu.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/815h7kelrdgtituseja9jqlqjj/44943813814.pdf
    • http://kaies.cn/upfiles/210623155449947068fn4m7l.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aabca63775---59443883881.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/173fddcdc5d0f64ef81b92471807ae95/kipoxawobaf.pdf
    • https://acrgroup.nl/userfiles/file/59265797545.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16098eb6f35593---10378759712.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/rv8vsd9qi5b0tbrn286njljka1/20764737119.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160796e4a76e8e---56282523163.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b44cf49f8dbe418e41e1dbf12ff6e60d/63902566090.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092d099dc07d---6281313150.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160902513e7664---11347936088.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c696e963bdb---sidudirujetazadepuwedeki.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904a3426f51---sezovid.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/jkhh50sjo6b0lp0t5q2rljq8jm/kulimitasubikivekozagedal.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a56352251---14013625621.pdf
    • http://magnachip.cn/userfiles/file/20210515125411.pdf
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/nulatijizinim.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c74718daa---14453312108.pdf
    • http://amctop.com/board_data/editor_img/file/202106221702.pdf
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/23784692344.pdf
    • https://advance-pack.com/editor_upload/file/92734884939.pdf
    • http://arci-mp.fr/admin/File/29464482179.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=chubby+mature+housewife
    • 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_off0000d0de.bin
972f66993e9615b33ee23f8f5c17e469ee05cf7921ca504f0142300e6447b0b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DE 10800 bytes
font_01_sfnt_off0000e9e3.bin
fe07b0ea20482889387ed78723850cfb1e9fb3caa2f1cd7563438b79c4c7eeba
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 17724 bytes
font_02_sfnt_off000118bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118BF 16792 bytes