Malicious PDF — malware analysis report

Static analysis result for SHA-256 a992c1f841261103…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 13:29:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 40ab91b0f9d22fb24f79c1e51cdea80b SHA-1: 6a3e1710cb7fdd6d537264bcc5ae6c9daca278fc SHA-256: a992c1f8412611030b31c5d788fd282ba2bd2e92488d5d3f4d0cca0dda14628a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites offering 'free generator / game hack' content, a common lure for phishing or malware distribution. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that at least one of these links points to known malicious infrastructure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/robloxhacks-game-hack In PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/roblox-hack-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/how-to-get-free-models-on-roblox_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/pokemon-go-basic-vs-premium-rewards_GM1094591345.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/minecraft-diamond-finder-hack_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F50 22700 bytes
SHA-256: 170a75d2c30ad435cc3ce9f1a6a5a1d671e776a1c031ddbe66199ca0ae684c16
font_01_sfnt_off0000625b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 18820 bytes
SHA-256: 2ccea82525463c59d3ef013baba30ec334edef503592fdffe768c3dcf14999d8

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