Malicious PDF — malware analysis report

Static analysis result for SHA-256 4699b147c7fa3ee1…

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 06:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5710c64c684819d17c625dcbcf43f251 SHA-1: 563112ae10e41ea304362d40a1bdb7bf6a889ace SHA-256: 4699b147c7fa3ee1c1882631fac1256fe3a205147a73bd6f9df595cc7460c622
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://laborke.ru/uplcv?utm_term=minecraft+ios+apk PDF link annotation
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f8aa2d447---55804314109.pdfIn PDF document text
    • http://strandedtattoo.com/file/18015411307.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/99586345243.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/kedosifubejuxewelivutewoz.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/4f715441863c6765cc9597ecfe778bc7/nubagiwogegeto.pdfIn PDF document text
    • https://questyme.com/userfiles/file/68377557437.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/lovaxovavarixe.pdfIn PDF document text
    • http://icbiz.ru/userfiles/file/sireronaniragux.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/kilajebodu.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/83653532048.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/6929580292.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/dorozopoxinusoxojejazu.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/levatusi.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/22888641138.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210911163443.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/98275373299.pdfIn PDF document text
    • http://bamila.vn/luutru/files/tifufuzejobejowagegal.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1154cc148952d74976a98a9eb7172344/febigujakuwabotejufeseji.pdfIn PDF document text
    • http://contextuae.com/resimler/files/zivazetu.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/58416711106.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16134cab88671b---43965562066.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/reponiruxeveniv.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/4c8c2627ad0ac5cb7c12fc4411639c0d/1508344087.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/xuvoj.pdfIn PDF document text
    • http://taociren.com/upload/file/210907055044665751usg7vn0pypi5.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_off0000e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C0 18244 bytes
SHA-256: 4040088d73861f9ced4201d8108282b8d45a27c9a09cbb827459efee8160c1b4
font_01_sfnt_off000111e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E0 10512 bytes
SHA-256: cd3a1e533a0f02777b5ff1e2f76d988502b9824dacec35a14c39242de229b09c
font_02_sfnt_off000129fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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