Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94570ae9371967b…

MALICIOUS

PDF

80.1 KB Created: 2021-08-21 00:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b0ec1e7bde0a6f94a11378a543756e54 SHA-1: 95715ef90e4e82862c963ef36ce47ee1d5624645 SHA-256: d94570ae9371967bd28d25ffa0990131c783a28317fb50eba58670c63cb073fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://archism.ru/uplcv?utm_term=rajesh+cherthala+flute+tamil+mp3+song+download PDF link annotation
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/80210124367.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/1d64fdc0f0838aac609ab65173043e83/jetobovanoretiwijazoz.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/18e00389d34c81ef13539a59621be3bc/89292247235.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/6ae244f911b08a6fb5f1b7383fa7dc36/bizibevozejopavumedid.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a89109ebb1c59ab002abe2d2d9b70f8c/7740911263.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/5af758a4d9ddf9dab17613f593d9bf20/91442881004.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/56350560957.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/104ca4ba741e36532a8f5f5835acacf0/mosixin.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/pofetojatofamivifubojet.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/74917673642.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///mefejesedim.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/romisizix.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fb2913ef5---32019748788.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db5b0485d2---16164408903.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/38780546545.pdfIn PDF document text
    • http://internationalbeautypageants.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/sezodisudapevupo.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc7d949fb3---jafukeg.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/tr2jf5cropcgu72gcii3teenje/84441359214.pdfIn PDF document text
    • https://businesslife.com/content/files/89621667966.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be41ae23ce---89521106146.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/7b990fc04bc53d31b0bc05495a722bd5/totovola.pdfIn PDF document text
    • http://jngf.cn/files/file/62357073884.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/20360f05ed15ec858c4624027ba19a7e/tudesojixidipe.pdfIn PDF document text
    • http://chikatere.com/Upload/files/numorusogabola.pdfIn PDF document text
    • 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_off0000d1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 16964 bytes
SHA-256: 41d1080cb68f05c8effb49faa96e638a60e19053610b9f96c6ac537f1e4f7fb7
font_02_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 11600 bytes
SHA-256: a81eb87de136ef4faa9f57e07655e3cb5247a38fbedb845d5413d61c3e394935

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