Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df3b41893a6c72a…

MALICIOUS

PDF

33.2 KB Created: 2021-07-06 12:38:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1af1cff4313c92826b791f6feae3874a SHA-1: 74ff47335c003ea438a9ec2d5febd984ab83b299 SHA-256: 4df3b41893a6c72a9f4c0dbec13f566aae1a5255b30d589b7b0ff2f0fb5707ae
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are related to game hacks and free in-game currency, indicating a phishing or scam attempt. One primary URL, http://netcdn.tw/app/431946152/grab-points-login-game-hack, is identified as a malicious redirector. The document body and heuristics suggest a lure for users seeking in-game advantages, which is a common social engineering tactic.

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/431946152/grab-points-login-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/synapse-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-alts-with-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-2021-free-robux-give-away_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/where-is-the-hacking-station-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/this-game-has-shut-down-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/promo-codes-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-roblox-bee-swarm-simulator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-2021-apk_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
font_00_sfnt_off00002efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFA 21404 bytes
SHA-256: 88b34e2ac28989aeb8ba1227eeec72b05c4ece793ed3f1000f62e627e23c6102
font_01_sfnt_off00005dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD5 18580 bytes
SHA-256: 2c24762620d9d623288236fe8aa88065cccc78c6fb64bc2c26f1a488593870f7

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