Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d15fb05bd6924a…

MALICIOUS

PDF

228.9 KB Created: 2021-06-30 18:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ed44556d2b3a6c02cea2a7b3347b1e1b SHA-1: 0b1337b66fdcf6bf900a2b315c81c1cfe3aa02cd SHA-256: 62d15fb05bd6924a505bcf7fa321842668ac7df8136d46293bd284a41ef0ffc5
166 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many of which are hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://medvor.ru/uplcv?utm_term=set+for+life+draw+1809 PDF link annotation
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d3357cb14---57112001953.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/xebebu.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/79787285002.pdfIn PDF document text
    • http://sam-global.info/files/file/balevano.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/f8fd98f9b316cfa37c9f800a5830c886/ruvajenowile.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/06c52d34c5b9901fd8dea3b70c3b1ba8/2066131945.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/negipipafegipenirevuk.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1df18cb61---48922100754.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/c1e210c5da93e46b29cdff0acf65a4a5/kukudo.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/dbb2nlcj2afkonll8o6im5qrkv/jewazenusoxerifidozeb.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f562667f1a---tifevu.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/d9f4fec8d02b3b5a5940ab97f3875933/litobisogukom.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/sininokosej.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/25734965976.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fa21bfee4---warefisaneme.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/36747388114.pdfIn PDF document text
    • https://petala.gr/userfiles/file/mojojo.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/junofumegegutomegaxakaka.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/87686516696.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ec9b0de9c---40356509605.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d932e14d7---95217550719.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9be751977---46868912032.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/69c5038a8a763f8768bf1b464cbfc85b/lorosavukabevapopodomezek.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/wijibogotiwi.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_off000328ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328AC 16724 bytes
SHA-256: 71bbed7d9e8cca17c09a73fb5e49f78682add634c7e8974a9eb6bb751aeeda8e
font_01_sfnt_off00035442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35442 10784 bytes
SHA-256: 454201fcc0eadf8ae3f8474346d5df26f2df9287cec328047715c43c44acebc0
font_02_sfnt_off00036d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36D57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1