Malicious PDF — malware analysis report

Static analysis result for SHA-256 1434c4ffd3aa8435…

MALICIOUS

PDF

85.0 KB Created: 2021-09-14 05:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: ebeb6375f24daf18ce6456fe2f55d160 SHA-1: f9c9ccd62abf4bf2e40906883d49153fd6d75cb0 SHA-256: 1434c4ffd3aa8435f2d71538807eca6213750276aefd8c1678aae6198e8a2960
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and multiple links to potentially compromised websites, indicative of a phishing or malware distribution attempt. The presence of a link farm on disposable hosting and a ML classifier flagging it as malicious strongly suggests malicious intent. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oreoltour.ru/sites/default/files/file/lezufukupiratededajakinen.pdf In PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/59914042124.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/gepoz.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/poniberewimejadofutawuw.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/84609644202.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/72602834780.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342a31bd536---53931068590.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/be4abc46aa1a8dbe03994a447c58b6e2/93695394502.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/5971907939.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/52114391569.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210909162408.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1630671326.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/31183001453.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/jukdqsns090tf545pelm7ftjk2/narim.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/retovatinutaguvenitezi.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b6be0b2e3---leretur.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/41189544645.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/juzanidironuno.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b325deb31e---wemazin.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/12771747073.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/7ae5838762c5194c92ef1a40a73b45b2/50672711840.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/79470884048.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/13193426185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=wrong+turn+7+the+foundation+full+movie+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 17224 bytes
SHA-256: 4dd6acfecb8e1d445a698b012e8d5a5be76fbbea60d48c4fbc2d1486ca09dbf7
font_02_sfnt_off00012cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD4 10928 bytes
SHA-256: 4c6e78290be4211447a9549bf958fd316314dade2fb092dd26e04f22d8a5e020

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