Malicious PDF — malware analysis report

Static analysis result for SHA-256 7127e1b840a3ba32…

MALICIOUS

PDF

45.9 KB Created: 2021-05-14 08:54:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 48f8f6873c5c9f2f914317d216c22529 SHA-1: a905bb8b4225a080fdd0cc74946aac7e031fcff7 SHA-256: 7127e1b840a3ba32fe2b6c144c15fc6263f2150708527122931c1604b8e9814b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free spins' lures. The document body and embedded URLs indicate a social engineering attempt to trick users into visiting these malicious sites. The presence of multiple redirector links suggests a campaign focused on driving traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-spins-23-march-2021-game-hack In PDF document text
    • http://apx-centre.ru/images/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bbd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBD 24836 bytes
SHA-256: 9a1a6e9a7297a9c3bff372687044b25c44e58e87e9c372b943420407d1321de7
font_01_sfnt_off000083cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CB 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00008fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB4 18628 bytes
SHA-256: ee10560f037836a310effba06f8e2a452031a98d457cdddaa4693c2fbbf13476

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