Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9eaf6f7ea6729e2…

MALICIOUS

PDF

75.3 KB Created: 2021-10-02 17:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: eda0674c97a12034f79d0fdff0c580ab SHA-1: f99092db75b70595c9fb27827f7f632f8d201e3b SHA-256: f9eaf6f7ea6729e219900c0d07499f54c0397b3643af0f9815f442a20dbafc9c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. The embedded JavaScript is likely used to facilitate redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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.
  • 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://thietkeweblongan.com/upload/files/4951831470.pdf In PDF document text
    • https://f2h63c2.ip4secure.net/upload/files/94820203029.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/35389320272.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210920085125.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/49446676311.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-4/20210904011544597842.pdfIn PDF document text
    • http://pnalog.ru/images/file/35884256812.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/78442068752.pdfIn PDF document text
    • https://virker-ikke.dk/files/89892859412.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161561cd270000---76363441554.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/fikolisavire.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161537fd47685c---dorebaxut.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/walinabut.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/wowijavedisefuwinuli.pdfIn PDF document text
    • https://bagstyle.uz/images/file/46163192259.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/55597684219.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/dijuwalixadewasekelonitu.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143c897499ff---jigageguwigegeduzeneku.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/49979887562.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/gidiwefe.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/88009097659.pdfIn PDF document text
    • https://masihpt2.com/contents/files/tupimajasibopiwibabud.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/47017108906.pdfIn PDF document text
    • http://www.centralperdana.com/file/51040539800.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/lufowalinu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=cyclepro+mentor+8+manualPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AC 19084 bytes
SHA-256: 2ce18f429f0309c72f34c1d17dc69c4b471dec91853501a77404a7a8a79c33f9
font_02_sfnt_off000105aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AA 10728 bytes
SHA-256: e6be594860e8e080544b7a3ab6ba8d12ee9a70fa099fa3a403f6f4bb5fa17ce9

Open this report in the interactive analyzer, or submit your own file for analysis.