Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60c2c07b2987a36…

MALICIOUS

PDF

89.1 KB Created: 2021-09-01 13:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 541597e6dc8f43aa1d1877aa499440c7 SHA-1: 8273b691e1f93f8dc6c90ff7aeb8b3a3cfe1654b SHA-256: f60c2c07b2987a369038767fbadea7fcd83228cb212ab6b36fbc41e3f167850f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised CMS uploads and disposable hosting, likely to distribute malware or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=there+is+no+god+pdf PDF link annotation
    • http://giftboxvietthuy.com/upload/ck/files/titike.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/947db672fa2980934874a31aa4704957/nowanetebanatarexexeg.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c525829bd7f---92482789221.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba71b0057a---ladaj.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/0d9cc294bfa732e9835867070e571653/bajikametijos.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/radimejarox.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/56937481254.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/6acp8fq8mt6dgginopmku4n9vh/pazoviditibovukareli.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/jelipolegufojujosekobuzew.pdfIn PDF document text
    • http://moristas.com/userfiles/files/19189475674.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/27693251158.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/89416349128.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/janezitemofuwiranowixa.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/1493024920.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d35de2b4bf---28532065011.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8e7a309683561a3f36976827276f399e/puturofe.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/54269022607.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c60ce9eb3d0---wekomok.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/0hoc1j24lqbspql5rp6r0t2vhv/73228501950.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/79293819752.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/14028615890.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca78641b86---93025228586.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/vokelixif.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/45596509732.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_off0000f3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 10436 bytes
SHA-256: ca2c788f9e8e33f6d2a52dbddbcf5ede9ed38f758ac215c0a48a377445c4cdc8
font_02_sfnt_off00012324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12324 19636 bytes
SHA-256: bd4ab38ada39e20fca295976db0eb79d5a7761a689b867fcdf4b38007c0f2631

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