Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b9eb28dbd7cdbc…

MALICIOUS

PDF

43.4 KB Created: 2021-05-12 13:53:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1fe2e24b0d9da475f669182efc92598c SHA-1: e12d97bec736605af0292fe96aa287b8a56c31c4 SHA-256: 77b9eb28dbd7cdbcaf05479fbb6be36948548808ca0910e0175bc23680f1c355
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, masquerading as game hacks or generators. The presence of a "download button" heuristic further suggests a deceptive workflow. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/479516143/how-to-use-wurst-game-hack In PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/robux-earning-sites_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/get-more-robux_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005012.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5012 24832 bytes
SHA-256: 97d19bcc47696f842612ced0e22a7c493c83fa11d4a81f96d94d99744a5dbe5e
font_01_sfnt_off0000881e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x881E 18052 bytes
SHA-256: a68273e95d9ad8d33f951bd54b666654e65060786c21df7f799ba901f89a275f

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