Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba902b0b87a595f4…

MALICIOUS

PDF

75.5 KB Created: 2021-02-21 17:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c3a7618fdec8b5b573e1f7d9c5be0337 SHA-1: 011fdcc20f9bcf23c70f046fd6ed1636938f10a6 SHA-256: ba902b0b87a595f4f79b1bd92768488e455d679a7da4acec23a30e4bbc0b9ef9
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or trojan payload delivery. The document body, though heavily obfuscated, appears to be a lure related to a 'Karcher pressure washer service manual'. No scripts were extracted, but the presence of malicious redirectors strongly suggests the intent is to lead the user to a malicious site for further compromise.

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://yafferge.ru/aws?utm_term=karcher+2400+psi+pressure+washer+service+manual In PDF document text
    • https://cdn.sqhk.co/jogekiluse/h5Ngjja/german_formula_1_qualifying_results_today.pdfIn PDF document text
    • https://cdn.sqhk.co/pojukitogex/fAc2yjc/pocket_rally_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/70pZgfh/fofegawibawi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367632/normal_5fc5af522efa3.pdfIn PDF document text
    • https://cdn.sqhk.co/danajuva/f6gigh7/download_parkour_flight_2_apk.pdfIn PDF document text
    • http://kfcrabota.ru/guided_imagery_scriptskaswe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_600f79793bcea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464702/normal_6005756a227fe.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/hjyjjjj/hd_video_player_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xaleteser/EgjhaeI/1351292430.pdfIn PDF document text
    • https://cdn.sqhk.co/mabuviko/g1jfRgj/20340652593.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/R1kwhcM/solar_system_planets_in_order_of_size.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_60270919de9be.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/aiajejh/tigawos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_602f452d082b9.pdfIn PDF document text
    • http://physcoo.com/21183783107curxh.pdfIn PDF document text
    • http://braco.ru/nilivax6y5yr.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_off0000e7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F4 5656 bytes
SHA-256: 05ac5f1f9c08d2f982ad61456c8ca5045f9fcc1c3ecc68163096853bd718e2c2
font_01_sfnt_off0000fb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2B 11020 bytes
SHA-256: 354c81383f7b3a97dad350bf8b70ae06acd933726d3e9127f894dbe3636b09b7

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