Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3891219977051e…

MALICIOUS

PDF

49.6 KB Created: 2021-06-09 17:44:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 159fc135a16ab81963d1871cda3a0227 SHA-1: 792c8017326c6805695d60c1f896cef455c96876 SHA-256: 7f3891219977051edfd7bc4b24f74cddbeb1fd969955e4cb84fd15317af49e31
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious domain, masquerading as a 'free generator' or 'game hack'. The ML classifier and specific heuristics confirm the malicious nature of these links, indicating a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a lure to a malicious website designed to trick users into downloading further malware or divulging information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-robux-for-windows-game-hack In PDF document text
    • http://torkelson.se/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/roblox-mad-paintball-2-hacks_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/how-to-hack-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/roblox-how-to-get-a-free-dominus_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000531a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x531A 27336 bytes
SHA-256: 5c60feab3c38c314cc26bef36a4a811fe97954c582ff77c3b02df16f2e057d21
font_01_sfnt_off00009126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9126 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCE 18668 bytes
SHA-256: 3d0d32d94957058d22a299fcd50e9441fbc2c24bd0b05647fa36018ab7942f4f

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