Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f35eae175b1c3fe…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 17:11:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0262b48f624b4f6f614a3730c746f9b5 SHA-1: b237788d02f70e50c2eee2320dad0d1189e72eac SHA-256: 6f35eae175b1c3fe66118072c6af48f83c1399501bdf9ff3ad20106070f07031
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a call-to-action phrase, luring users with promises of free game currency and hacks. The primary URL, http://netcdn.tw/app/431946152/free-robux-hack-game-hack, is identified as a malicious redirector, indicating the document's purpose is to lead users to potentially harmful content or phishing sites. While no scripts were explicitly extracted, the nature of the lure and the redirector suggests a client-side exploitation or download attempt.

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/free-robux-hack-game-hack In PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/pokemon-go-free-2021-tier-list_GM1094591345.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/krnl-download_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/roblox-i-got-a-gross-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/pubg-uc-or-pc_GM1330123889.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/roblox-how-to-make-animations-free_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/make-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/games-in-roblox-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/minecraft-linux-free_GM479516143.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
font_00_sfnt_off000033be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BE 22588 bytes
SHA-256: 03666fe56aa9fc88ca2983103fe8baded61f26ecc6575eab7b071a16fea6d05c
font_01_sfnt_off0000661b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 18884 bytes
SHA-256: dc79040e010cad5ef573560dd0163568f4a40b7ac77bac9f212c194fdd2f4c7b

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