Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70c43a9efbdeb43…

MALICIOUS

PDF

43.5 KB Created: 2021-06-09 01:52:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4ecc565749dde555ef12e0a6c0466228 SHA-1: 6d10fef3d3d6821d7631196f5d12fb6dfba475b2 SHA-256: b70c43a9efbdeb438b65e133ff32ca7a78dc1103473c89aa9e4f4064fdfecfdc
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links designed to lure users with promises of free game hacks and currency, redirecting them to malicious infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary purpose is to drive traffic to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/835599320/how-to-get-free-tiktok-fans-without-human-verification-game-hack In PDF document text
    • http://technologicalsc.com/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/tiktok-free-robux-hack_GM835599320.pdfIn PDF document text
    • http://technologicalsc.com/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-hack-no-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_004_off00004c7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C7D 25180 bytes
SHA-256: b13ef4ddc604c427f309b373e2c83c71527b1355c55f8181c3d648637714b28d
font_01_sfnt_off00008622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8622 18748 bytes
SHA-256: 9c1c07c767fa9d9d53b8a100ba390363441f73e8e5d8be898b87013d8ae4ffbd

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