Malicious PDF — malware analysis report

Static analysis result for SHA-256 268c19c89fec1553…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 04:23:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0a38d3f68f191afbb136168631415aef SHA-1: 48a8c5104a8ec95da1b475578007506ed802fdfe SHA-256: 268c19c89fec1553561d864a32e077a86c5c33fae292283134db769f8daa91b0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users to external websites, many of which are part of a link farm. One critical finding indicates a direct link to a known malicious redirector infrastructure. The document body and embedded links suggest a scam related to free game currency or hacks, likely intended to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spins-on-coin-master-iphone-game-hack In PDF document text
    • http://tileworld.com.au/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/code-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-get-free-robux-any-time_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-catalog-heaven-free-vip_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-vehical-cheats_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/hacked-project-pokemon-roblox_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/100-working-free-roblox-coin-gen_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-character-free_GM431946152.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_002_off00002f87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F87 22852 bytes
SHA-256: 1db35ef87946c5b2ec7e22dad7353e7ab0fb690640378279d209d343baf47ad0
font_01_sfnt_off000062d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 18340 bytes
SHA-256: d8d1d40114665b3c656d9b588321506710889a59a74c949fe41f6eb184067811

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