Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47f9aa037583263…

MALICIOUS

PDF

96.1 KB Created: 2021-07-03 21:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86b5297cf247f01b8e415e02203054ac SHA-1: b4711ea051a0d72cff0215bff17df933b4d65231 SHA-256: a47f9aa0375832639a6ac9c3ee68b5e1c848213fefa34776637226e1861b3088
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious content or exploit kits. The file's structure and embedded URLs suggest an attempt to lure users into clicking through to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://allytemp.ru/uplcv?utm_term=how+to+perform+ghusl+after+wet+dreams
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/19794628736.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b75cc2e94ac---bukunojukixa.pdf
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/f12fi4qv6ju41nosb7r97368vo/88950610950.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/d3fad71375f709e73c734e75989d4cec/bulevelixetoz.pdf
    • http://kaupa.cz/userfiles/file/fitajavo.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/7erqr100ou9luudeck7q1vi6m0/kaxedorovurom.pdf
    • http://aircond.md/upload_fck/file/pofegoxexunamekuj.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/9be0f2997e78e0e1adb0894dcfa9465a/wibefeb.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/25553dc5a80e1fa11046be5d13c89adf/padevolixumutowasamewaz.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4b399656f58a29b0a07b64c2e0095ab1/95427227090.pdf
    • http://zae.me/datafiles/file/24690988846.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2c95b0413---12666428681.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9r6iqete5q655e4042aq0ku5j6/79435778609.pdf
    • http://www.findvoters.com/userfiles/file/74596993657.pdf
    • https://srmhospitalities.com/images/bulk_images/files/xoxusagawewafulone.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160990ba5122bf---9286633725.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9004d063ecc48539c4a122f512ef9fd6/wiborixopigojojubanomon.pdf
    • http://dianacb.cz/userfiles/file/14949465089.pdf
    • https://ajitcoatings.com/uploads/34740732787.pdf
    • http://yilip.net/userData/board/file/69187226112.pdf
    • http://naturallabs.fr/userfiles/file/gizugibaralumivix.pdf
    • http://mobiliteit.nu/files/wikufopixalasap.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/xalexugemapasem.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f78b.bin
d5e335da7b5d95f57d06dedeea6e4659ed0850a1e8f72f522210fc4879156500
pdf-font-stream PDF embedded font (sfnt) at offset 0xF78B 18524 bytes
font_01_sfnt_off0001283c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1283C 16792 bytes
font_02_sfnt_off00014053.bin
450e3cfa6492182b6aed85483a36c1e8a7edbd3e4ddc1df4e2f3823d9d2d4761
pdf-font-stream PDF embedded font (sfnt) at offset 0x14053 10928 bytes
font_03_sfnt_off00015979.bin
386d30ecb028ba6d0b72ce68f89fcac55d564628e01cf50d5e1466d34ee12861
pdf-font-stream PDF embedded font (sfnt) at offset 0x15979 17016 bytes