Malicious PDF — malware analysis report

Static analysis result for SHA-256 f104188a8a1ef275…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 22:22:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9ae0adb7a13cea57c76baa45c259ffc0 SHA-1: b6f8bef17543ed3535bf4143200d5d0d60e7113f SHA-256: f104188a8a1ef275b671ceb62a057e1b39de8ec4bdef4f6461c611b8c4e63cb5
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for free in-game items, likely a social engineering tactic to drive traffic to malicious sites. The presence of multiple PDF links suggests an attempt to create a link farm for SEO manipulation or to distribute further malicious content.

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.co/app/431946152/free-robux-world-game-hack In PDF document text
    • http://www.myresidence.lu/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-stuff-on-roblox-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-without-paying-money-for-typing-password_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/cheat-codes-for-deletive-mod-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/robux-generatr-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-roblox-hided-head_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-dragon-ball-rage-cheats_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-spin-and-coins-links_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_002_off00002f2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F2B 22984 bytes
SHA-256: 3f3ab68f837ec4669a6e8056fbc3a28945abc6d2fcc412d7e2ca2d2a156d9bf2
font_01_sfnt_off000062e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E8 19160 bytes
SHA-256: 3832b69863fc812dfa883c8ba61f700188df6bf4a4b5bb1fbc7afe46493b6a81

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