Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc3f212c7d0cdfb…

MALICIOUS

PDF

51.2 KB Created: 2021-06-09 08:18:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 65f7fad2a824803d5acd2acfdcd3d30c SHA-1: 79c881c58802bc2c907d1c36b0648590548008bc SHA-256: 6fc3f212c7d0cdfbb00669b65c52bc9945b439fe5c596e48d3aa67d4d714228e
260 Risk Score

Malware Insights

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

This PDF document employs a lure of free game items and hacks to trick users into clicking malicious links. It presents a fake CAPTCHA, a common social engineering tactic to coerce users into interacting with malicious content. The embedded links redirect to potentially harmful sites, indicating a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/goku-ui-free-roblox-skin-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/5-sighns-that-u-have-been-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-play-as-guest-free-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-deutsch-auf-pc-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pubg-uc-shop-qatar_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/festive-shoulder-owl-roblox-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/when-pokemon-go-free-will_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-dominus-roblox-event_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://www.bandicam.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E3 24036 bytes
SHA-256: d33b30d023722f35099f0064907e7501d86b6f5f7d15959ef1b782baa34617a8
font_01_sfnt_off00008791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8791 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9434 6768 bytes
SHA-256: fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a
font_03_sfnt_off0000a473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA473 18564 bytes
SHA-256: 8fcecbd8330a37c0a60aa98dc598ed4c5e72f77a402c477243d0cf21bb0a63c9

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