Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d331a68d2801e3a…

MALICIOUS

PDF

38.0 KB Created: 2021-05-20 22:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 15e922ca42e7e17d5e9336580eae2e66 SHA-1: 6cf0171716babcf6e05fb612bb7b97a664750d1f SHA-256: 0d331a68d2801e3a5f62df59442bfe46084b904ddeff1bb702a62d5138220a8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary focus on a malicious redirector disguised as a "Coin Master Free Blogspot" game hack generator. The heuristic firings confirm the presence of malicious redirector links and a lure for free game-related content. While no scripts were explicitly extracted, the nature of the embedded URLs and the lure suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/406889139/coin-master-free-blogspot-game-hack In PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/without-pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
stream_002_off0000318d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x318D 24252 bytes
SHA-256: 51881b5372840c6fbb4928ad1ee06aea82f1f23e8820f8cca4ab1b4c70bf4a66
font_01_sfnt_off000068dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DC 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off0000727f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727F 18464 bytes
SHA-256: 3d1506adb004325b5ad849f11167115e1f90dbd1428f7e6d98779d75984a0c30

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