Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9f1718c4c826d5…

MALICIOUS

PDF

74.5 KB Created: 2021-02-18 11:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cbe2b51ceacd9c004ecfb206ab48762f SHA-1: c236579e76cfce079429bb3bc41ab5bc96a58d70 SHA-256: 6a9f1718c4c826d507322da36f4cdcdca98975de7dd562ef368e39b8d0a670d1
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a redirector to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to diet and the authoring application, suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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.
  • 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/strik?utm_term=what+to+eat+daily+on+plant+based+diet In PDF document text
    • https://cdn.sqhk.co/wugunifikezu/nIwmrih/28556387068.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/TgfhhJi/78503624260.pdfIn PDF document text
    • https://cdn.sqhk.co/bemapebe/iaLqYAW/north_star_meaning_metaphor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477637/normal_5ffc16fb1a973.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426543/normal_5ff9b9e851de8.pdfIn PDF document text
    • https://cdn.sqhk.co/godivago/fVhajcU/wifi_signal_strength_test_macbook.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/KOedYjj/nonidatuperomigapibepe.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/jxdqkjg/asa_show_security_level.pdfIn PDF document text
    • http://lasabobobatir.22web.org/50931566508.pdfIn PDF document text
    • http://xuxelenoxuze.iblogger.org/87618756433.pdfIn PDF document text
    • https://cdn.sqhk.co/putepirapad/hdJ8jbo/feudalism_in_japan_lasted_about.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/clHRJcN/kokamuxalelamenoz.pdfIn PDF document text
    • http://buledumemo.iblogger.org/calculus_math_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_6028fa2063b4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zexubadisaki.rf.gd/xemevasujedirorojib.pdfIn PDF document text
    • http://jojomuge.epizy.com/blender_3d_animation_apk.pdfIn PDF document text
    • http://kikexufan.epizy.com/clyde_river_fishing_report_vt.pdfIn PDF document text
    • http://wokepotaku.epizy.com/berlitz_english_level_5.pdfIn PDF document text
    • http://siwojanapav.epizy.com/cheran_pandiyan_comedy_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 5208 bytes
SHA-256: 2018eb20e5b3d4537d965436eb9bff0a24bece54859e9ab2461f272221de5f9e
font_01_sfnt_off0000f869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF869 10784 bytes
SHA-256: 2e85a18e827ffd097ca88423fa08c71c73b4ad94eb0048da1b657c8946e8293f

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