Malicious PDF — malware analysis report

Static analysis result for SHA-256 9274614a6bda9faa…

MALICIOUS

PDF

85.3 KB Created: 2021-08-26 06:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d3d6e003351c1dd742bb8a7cc930979 SHA-1: c51ac015df647d677e1c462e3028e456d51f1b04 SHA-256: 9274614a6bda9faa7f9a71ed4c93179d152101eb660d591a895885ef26834107
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's used to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://palaciodelosnavas.com/userfiles/file/22087465957.pdf In PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/rovuzovubozepamavaximon.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/68452800461.pdfIn PDF document text
    • http://honda-vo.com/upload/file/bowuvowusuneporazikusug.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/xidokenezidojotakokibimig.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/e91e7b83268afbf23d531f240b6a7236/sezakakijuvilep.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec76cc54c1---bomixorixuwiduwepepof.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8ff15b2aceacf1096eaf32e92714f619/tijunetorofatigor.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/95977429848.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/63743522272.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/51749584290.pdfIn PDF document text
    • http://learningkey.org/userfiles/9669725531.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/66478335048.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/tobuxiwugeboti.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7ab64f794179d7a6af4fe2bf4bf4d925/24144780646.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44686864125.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/68096168591.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/783d19c9e9c975ff51a8fe33b69fa289/rodilime.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/o9r4vigr96sfdob6lmmfs9k0vc/voxojojolakelominanew.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/0c2e00cc1e98965bc2b2435d3bee47d0/1782059964.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/63474301475.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/26495695193.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/94178242762.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/tipuduziposotok.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/34523357375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=fantastic+beasts+and+where+to+find+them+next+moviePDF 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_off0000e791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 17204 bytes
SHA-256: 4dab22f03ee94307d673f445dd236daf64472c0479dbaea994bec087b0c6b421
font_02_sfnt_off00012c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C75 11068 bytes
SHA-256: 553d9b51885002028cecf466f16cbdaae50bf38c43be49aabff2d028953b741a