Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab41a875490cd09e…

MALICIOUS

PDF

37.7 KB Created: 2021-05-21 18:02:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e1b7291ac20053566e54167aa8265d56 SHA-1: ebe244bbd53255c0e91ed28e779428fd34793e29 SHA-256: ab41a875490cd09eb6191d8fa4892e33bbefe5129998bfdd69d901ee21b120a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are identified as malicious redirectors, specifically luring users with promises of game hacks and free in-game currency. The document body and heuristics indicate a clear intent to direct users to these external sites, likely for further exploitation or malware delivery. No scripts were extracted, but the presence of embedded URLs and the nature of the lures strongly suggest a phishing or scamming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/free-robux-no-human-verification-or-survey-2021-game-hack In PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/free-tiktok-followers-zonder-verification_GM835599320.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000333a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333A 26048 bytes
SHA-256: 608c93f3efbc69e02c4d935a1c389aec41f69bce3ba6e5c8d9ed3e9d306d8fa5
font_01_sfnt_off00006e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E59 19556 bytes
SHA-256: 08b2a18d96b3566ec838f0e87c4bb916e955b8f8af04b9064418114d078945b8

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