Malicious PDF — malware analysis report

Static analysis result for SHA-256 854bbd20be41b913…

MALICIOUS

PDF

35.1 KB Created: 2021-07-21 01:03:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 26129bd6ecbc65a6f8759183dd8c0629 SHA-1: 589d3130fe66baf5a1464731977811e889efce76 SHA-256: 854bbd20be41b913c48f2009e273b7e2cbfeac7b1025e43fb68ad6828c3ada5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as a game hack generator. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. The presence of these links indicates an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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 http://netcdn.tw/app/406889139/coin-master-free-gifts-game-hack In PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.approachpeople.com/wp-content/uploads/fsqm-files/coin-master-hack-without-verification_GM406889139.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_002_off000033f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F6 23460 bytes
SHA-256: 3abc3c9b2d513c0bf97e5ab40c826427aff210c2c421999393f5124c38cceb5a
font_01_sfnt_off00006900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 17712 bytes
SHA-256: 401d56b29285354d6954c3c26e793cbeb56329cdc5209d9139ec018457d4ba23

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