Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82ba2cfc14c790d…

MALICIOUS

PDF

45.8 KB Created: 2021-05-15 15:26:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e8b2326418a5a4de7133a7cce63b21f0 SHA-1: fb8e38687f1a3dc7c3d6fe1069fb9d1ef0df785d SHA-256: f82ba2cfc14c790dd45d58c3e37e953cf93de09b882dd2b57b68a486908fd6a5
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to malicious redirectors and a link farm, masquerading as game hacks or generators. The presence of a fake CAPTCHA heuristic indicates a social engineering tactic to trick users into interacting with the document, likely to trigger the download or execution of a second-stage payload. The document body and embedded links strongly suggest a lure for obtaining in-game currency or cheats, which is a common phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-18-game-hack In PDF document text
    • https://de-licht.com/image/data/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-robux-games-that-actually-work_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
font_00_sfnt_off00004a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A58 25152 bytes
SHA-256: 574f65ff17a5d27f6bb3507cf32ee1fc055ca4fb898622109ea9b5361a134dd7
font_01_sfnt_off000083f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F2 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9104 18100 bytes
SHA-256: b4983712f09b148f8a8b45296f8ff968c6e941a598ef477ab36d5db1dcb352e3

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