Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e72fcfbaa16bd07…

MALICIOUS

PDF

49.6 KB Created: 2021-05-18 05:05:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f6ea1636ece3251f3ba02b17428c6ec2 SHA-1: e1d0cd7701ba35918ed3d376837eb054f74970ad SHA-256: 1e72fcfbaa16bd073d5d43c95936c00abe3a104fb62bd4e05fb97ba37906b145
260 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into clicking links related to free game currency and hacks. It contains numerous links to redirectors and SEO-optimized PDF files, indicating a phishing or scam campaign. The embedded URLs and the document's structure suggest it's part of a larger effort to drive traffic to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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/codes-how-to-get-free-robux-game-hack In PDF document text
    • http://pisanie-nut.pl/images/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/robux-robux_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-email-rewards-link_GM406889139.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_off0000485b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485B 31420 bytes
SHA-256: cae86d41fb0f592facfa5b9629c7a50e36b6025e62630cfc0ec8cba3465b667a
font_01_sfnt_off00008d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0B 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off00009eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EEE 18456 bytes
SHA-256: e7ed60d24a78ba6057de20e743a58d73d760a91b60c41324c250f3bd6f119d62

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