Malicious PDF — malware analysis report

Static analysis result for SHA-256 46badf27b633a72b…

MALICIOUS

PDF

84.0 KB Created: 2021-09-03 04:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ce3b18ac79f0c4c522b103dc6567272b SHA-1: 71e945ae751578cc5bcbb86e1e89f18dda5a4d55 SHA-256: 46badf27b633a72be6cd04f3dd7a223ae55c4728b28083c15a612ba32ab6ea29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, with many embedded URLs pointing to compromised WordPress sites and disposable hosting, likely to redirect users to malicious content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://thegroverestaurantnj.com/userfiles/files/buxadawiroxux.pdf In PDF document text
    • http://sotel-perm.ru/site/file/jafeme.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/54666936146.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/20461981982.pdfIn PDF document text
    • http://newfieldclassof1982.com/clients/6/69/69e49ffade321d977af769e13f9f004b/File/75565557242.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbf50b5ee7---detolezirewebepitubu.pdfIn PDF document text
    • http://julianina.dk/upload/file/siwuxaderanulugapoko.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/53729932898.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/e146720790876d3a01aa057aaa37a776/latewiloxozizuputetojuk.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b93f034176d67a6c57b007aefebd0925/94974098422.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16100db6d33aed---20984409847.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/dodemitiluraleni.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085d9e9f240c---69071383640.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/fadexesi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/72cca51e8f965f222c2a06300c3eb223/70475548048.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/80192456927.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/61316297801.pdfIn PDF document text
    • http://labsshop.com/d/files/fumegovid.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/88400032201.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/37004863645.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4646387ef---89761088929.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/11564192531.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/feruwovawasamanupeni.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-7-10/20210710131400456130.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/gowelajezotamidunafevabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=fibrosis+quistica+en+ni%C3%B1os+pdfPDF 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_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 11136 bytes
SHA-256: 49471d77e1bd463d68a969dc0751210ce487cc7234ee79f0c8de573b55783450
font_01_sfnt_off0000f9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 18396 bytes
SHA-256: 6352284486e717e8e1068dfe99e8806bd0182b91daa6ba642857290e55de134c
font_02_sfnt_off000128a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1