Malicious PDF — malware analysis report

Static analysis result for SHA-256 93434a3e7db021da…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 18:40:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ec2139d98c03d16d491bf1e4757c2091 SHA-1: fa48899bc80674d452ebe1c1c6d7521812e52238 SHA-256: 93434a3e7db021da09180ade2ed1a70929eac8539dfdcb4fd3b3f4ad73b5180c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a primary lure related to 'free coins' and 'game hacks' for popular games like Pokemon Go and Coin Master. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the links. The document's primary purpose appears to be directing users to potentially malicious websites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/1094591345/can-pokemon-go-free-coins-game-hack PDF link annotation
    • http://zercalo.org/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hair-for-free_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_003_off00004889.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4889 24332 bytes
SHA-256: 9ec6925e876b9da6791b8920e2ff14a832b287527402ebcdde8d59a2415e9419
font_01_sfnt_off00007fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA1 18192 bytes
SHA-256: 4d69425da167617d3ec0cb45794066bf1127a228d95557b2e442107a9f76ebf5

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