Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7eca92c482af3e…

MALICIOUS

PDF

82.5 KB Created: 2021-08-28 11:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71ff27a6cf43459d0bef5f3a024a11dd SHA-1: d7b30eb40ce478e03efbfe18c5fc0e81e485bfa6 SHA-256: 3c7eca92c482af3e1942c19ceeca6a66fb840f81dc4b634da37f9f8f74ce5cfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 websites and disposable hosting, indicating a likely phishing or malware distribution scheme. The embedded URLs suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://phuquytravel.com/nguyenvanlinh/files/jixivov.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e023e94c693---nufuto.pdf
    • https://dailyiat.com/html_upload/file/tanafibitefajakataberuf.pdf
    • http://yaqeen-eg.com/userfiles/file/3087750323.pdf
    • http://tbm-mova.by/images_from_html_editor/file/57401896718.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/dudomogutugijejuw.pdf
    • https://drlanda.hu/user/file/sevuvulovotigevitozadutiz.pdf
    • http://elementsgogreen.com/userfiles/file/segosoxe.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/852c5bbd488e6da7f514506fe6544918/fogag.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160749f16e01ba---36181060489.pdf
    • http://93564497.com/userfiles/49660892294.pdf
    • https://bouveau-consulting.com/userfiles/file/lunulonajulupujo.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083386ad0404---39349761458.pdf
    • http://madinaboys.com/easydo%20v2.00/files/uploads/68894266231.pdf
    • http://studioguagnoni.it/userfiles/files/75561084913.pdf
    • http://primaria-ciocirlia.ro/media/file/julilivupepasobidifuvi.pdf
    • http://dogable.de/userfiles/file/2617684915.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160945952a28a7---werenewor.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/mliku36rovs7bnf423m9utu3qo/79121507373.pdf
    • http://hasanmasat.com/ckfinder/userfiles/files/navubotilenuxonu.pdf
    • https://burgas-remonti.com/userfiles/file/44029026010.pdf
    • http://acudrved.com/ckfinder/userfiles/files/jarudasuridufixejoro.pdf
    • http://asbufestival.com/uploads/FCK_files/file/96325015386.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/m238n5t440bsp11kelghqlr7l2/jinukajuwuxarugobegadov.pdf
    • https://projetovm.com/uploads/files/90092535097.pdf
    • http://peak-experience-europe.com/images/blog//file/tavosub.pdf
    • http://cleanyachts.it/writable/public/userfiles/file/zugisobiwukedatid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=point+buy+system+5e
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4e.bin
b8d8e95592c8259dd47a3002d3b45d8410529ddb624990e98748c69c71480f2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4E 10452 bytes
font_01_sfnt_off0000f41c.bin
3e005c9964b6741c1cbfabb2c6c1aeb2c443976645310ddde09c12ce1d317777
pdf-font-stream PDF embedded font (sfnt) at offset 0xF41C 17500 bytes
font_02_sfnt_off00012174.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 16792 bytes