Malicious PDF — malware analysis report

Static analysis result for SHA-256 4316f9de9ae88936…

MALICIOUS

PDF

72.3 KB Created: 2021-02-17 19:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a1e9629af20458d6ed79c99d043bc43c SHA-1: c0082b2ddb198b47ed2c02fe56c84124fbecdb0f SHA-256: 4316f9de9ae889369f6a0505e891ddd8622c0c23f27ed15cf86c9ff98e669333
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to a "bike computer manual". The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing attempt designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/wix?keyword=schwinn+wired+bike+computer+manual In PDF document text
    • https://cdn.sqhk.co/romilononove/CibGkeb/96355906787.pdfIn PDF document text
    • https://cdn.sqhk.co/xagunetoxa/EvapVgi/tmnt_brothers_unite_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/xjeijhi/truck_wallpaper_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/rujoremebi/GjchgTH/molulunixonizoguzinazoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/gozigawefo/cgdjibS/31643255545.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421614/normal_5fcacc22ee866.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/3OwhjdS/zara_sale_usa_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fe99d0db8814.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/4fjdifN/60222507525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367642/normal_6006abca465d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_601a5054025d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_601723a090f5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417645/normal_5febc1e160ba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427079/normal_5fe7a6db6290d.pdfIn PDF document text
    • https://cdn.sqhk.co/jifexekezeli/hii7Hjh/akinator_download_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/hgglzig/makurokulibuzegefeneb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pezofut/ganuripa.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/avastin_medication_guide.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_off0000dfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDA 5532 bytes
SHA-256: c5965c9519a8090150ab5340b353b16d4bc6c4bd43ac2cf9268408247f405711
font_01_sfnt_off0000f28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 9844 bytes
SHA-256: ca776e029507a0b8d503461c69c6f181ef97249b5c8dd1afa61ae36afa0f1bb5

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