Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1a850c07042575…

MALICIOUS

PDF

37.1 KB Created: 2021-07-03 20:23:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 84696db2668cfb341ba618247e19571a SHA-1: bb9213e9138e0b88301c4242aaf078ed64985aa8 SHA-256: 0a1a850c07042575888c39a1d7177a296c1e947d7b490a4849939e6ec73c9be6
160 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, specifically advertising 'coin master free link blogspot game hack'. This lure, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware distribution attempt. The document body and embedded URLs reinforce the theme of game hacks and free in-game currency, common pretexts for such lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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-link-blogspot-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-costume-roblox-glitch_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-hack-cbro-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-get-free-robux-without-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/prison-life-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/redeem-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-robux-without-verifacation_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-real-working_GM431946152.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
font_00_sfnt_off00003040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3040 22720 bytes
SHA-256: 1eaecd8fc0b375e1e097ec9af9026b1836e9576385275a3b71a46b05288e22c5
font_01_sfnt_off00006346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2B 18632 bytes
SHA-256: d0d574b1662071f3403a16b1a6302b8c72ae4679adcfbefd57853cfc863fd1c5

Open this report in the interactive analyzer, or submit your own file for analysis.