Malicious PDF — malware analysis report

Static analysis result for SHA-256 211f22d9be1e758d…

MALICIOUS

PDF

76.8 KB Created: 2021-01-01 22:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: db5377709328a35835a615a1d613490d SHA-1: b0917285938dbc6f91e93813a138d18aab52e78c SHA-256: 211f22d9be1e758d71f24cd4533226505d88bc1b953d1074141a2b2fef542146
76 Risk Score

Malware Insights

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

The PDF contains an embedded URL and heuristic firings indicating it is malicious and uses a password-protected archive lure. The document body, though heavily obfuscated, contains text related to 'Clash of Clans hack no download', suggesting a social engineering tactic to trick users into downloading a payload. No scripts were extracted, but the presence of external URIs and the ML classifier's high confidence point to a malicious downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafffe.ru/123?utm_term=clash+of+clan+hack+no+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416318/normal_5fa27cd20ddef.pdfIn PDF document text
    • https://cdn.sqhk.co/gobikazifelo/1ihhhgf/likee_video_status_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459319/normal_5fe44859f3afe.pdfIn PDF document text
    • https://gurisowumar.weebly.com/uploads/1/3/4/6/134686590/4875867.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/siwofesapenopiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5fc33af1bcd64.pdfIn PDF document text
    • https://notupazepikinis.weebly.com/uploads/1/3/4/3/134382888/suvisodojes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_5fc054d03f68a.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/zifilobesumafi/bepaxofiwilot.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 2972 bytes
SHA-256: 930f23d2995161be8163e1e1cc0825de794ffa756557b40d0517da21fd913d21
font_01_sfnt_off0000e0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 4736 bytes
SHA-256: cc334c0aa3ed9d8e69678fffc8cfd18d270f260917e500943bc2f0a0949c0aa1
font_02_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 11596 bytes
SHA-256: 8d02782db903ce6e0b2f2a7847195b7653ddd7e8fca655e8c2556ecaef04b408
font_03_sfnt_off00011891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71