Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a44f629d8204d5e…

MALICIOUS

PDF

80.8 KB Created: 2021-06-16 11:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fe934de4267f102b0ae801b1cb7832a4 SHA-1: e922b638735e9f980924b6646a0785ddbd9a9820 SHA-256: 5a44f629d8204d5e56d888417f2764521cd559cdc5e69f9e60539184f4a3d7a8
156 Risk Score

Malware Insights

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

This PDF document contains numerous links to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The embedded content, though heavily obfuscated, suggests a lure related to a song download, aligning with common social engineering tactics. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://infrive.ru/uplcv?utm_term=ho+gaya+hai+mujhe+pyar+mp3+song PDF link annotation
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9001a1d60c7ca6ee38bbd27916da8b0d/fezoros.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/lenodoguvabavopunej.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/e6f28a919a3f75338895545f116f5eed/51726820985.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f4ff401d1edce2624fd447ddbf469c9b/poxabafebepove.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608749e9a0c32---43230187864.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/292334551476.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2ff3dd64---28028945033.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b238865bf68---42403933905.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/rnai6nnsk2crasmf962gvfid0s/79818609815.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/27caadca11e481f5c27dc4c71d64f020/pisozakuxelesitidobozeko.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d949b4728---jonori.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/kafunudikun.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b86aa996d06---12557439948.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3be0110d7---wodapi.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/56964680082.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/nutovuwuselefami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF92 5504 bytes
SHA-256: 0f97df946603ab046b605d4f02f24ce6cffdba03c643380b17b9d1682c7895d1
font_01_sfnt_off0001122e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122E 11056 bytes
SHA-256: 81aeb6733e76ddd4642eb2a46e155a0ab2129676fc687b3ac1cbe6cfdf2e2925