Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74e5054eeb52b0d…

MALICIOUS

PDF

80.8 KB Created: 2021-08-02 04:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 404617d854bee6bc0963e08ce01bd0aa SHA-1: bcf631f5756e28e1f82920b69b881c28a741b28c SHA-256: a74e5054eeb52b0d907ac3a37b35679cd0a617fb31768233b52107dc0f075bbb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://inwebjor.ru/uplcv?utm_term=batte+forte+oppa+gangnam+style+mp3+free+download PDF link annotation
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e8b542fd6---1231870530.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/25715686205.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608247a967baa---99976501038.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/xanaxudalokevabilizifom.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210716113122.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b229d619d4---wezanovixikudowi.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/37706349897.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/26195627258.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/2136075940.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/edc17aa32f6ed66f6e8ad02e21ea7f45/66868595093.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871fce165fa---96451221315.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/60659440556.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092fa35896b2---29432102412.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/76560047461.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b6848ff21---reluwedimudi.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/46280311153.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd44b601a---87572461615.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/49053241652.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/57751d5972a94ae563a13e9784e9cef8/99742457470.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210623_005425.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/70719200102.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/53696914763.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/gozoborawiruxe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A9 19696 bytes
SHA-256: 830bd4158d5cb681f57c98f1fdbf72f34c9350e94919d17ceeb37fa2e9cda7f1
font_01_sfnt_off0000f804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF804 11172 bytes
SHA-256: 5ab5e8f6bee1407be7ff988884c410b40d3c82d512bff14d103d762a624c19d4
font_02_sfnt_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 2332 bytes
SHA-256: 2373811311fa6e1ffdb3c7f1cdb774fcdf1958481577622a645e68fd1ad02f08
font_03_sfnt_off00011c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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