Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a957d2ba22f50e9…

MALICIOUS

PDF

73.5 KB Created: 2020-12-24 19:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a9cf0d5300407ddf74a5e86695407e98 SHA-1: 7978c52593c4d832266199ae6e794e7468da958f SHA-256: 7a957d2ba22f50e9db1afa11cb77cf41fc83c110a50cb6b551142b17889662e8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to a URL that appears to be a lure for a game modification download. ClamAV also detected this file as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and malicious URL strongly suggest an attempt to redirect the user to a malicious site, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=airport+madness+3d+volume+2+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_5fb4f28b25d46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fb25d046da51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456166/normal_5fc694cc1da86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5fbc419f9479e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5fa318c32f589.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/satudifin/motorcycle_light_bulbs_replacement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/mopubebajevigo.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/netaredimoresuwunov.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/bilivamurem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e3841dd-d24c-43cc-9b04-ee21e7d6537c/exiled_kingdoms_cheats_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d314f10-f304-4392-aa42-72704ec5def6/xigof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4987d83e-f7fa-4930-9f8b-49c9e27e9c34/dugutofewikabigepulifox.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/82353192563.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://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC815 5396 bytes
SHA-256: d1e5ca564dc932fe71f8e456eddb606ffd9a8d1a4215dd89816477d14506fa31
font_01_sfnt_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 15192 bytes
SHA-256: 2987c4562c85f9c995a0becca01741580845f75ea1cffabf85b5a1acf3d6cacf
font_02_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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