Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6be0dc1d2fe6fac…

MALICIOUS

PDF

53.2 KB Created: 2021-05-10 13:34:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b1bb0e94e5ab4fd0c501b014da275e9c SHA-1: bd554696559fd8bcc8e324702bbc46abd83cdc5f SHA-256: f6be0dc1d2fe6facbf9cbc310ae3adb327a343568b4c80ce1e3b8371964b56e9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to redirect users to malicious websites, masquerading as "game hacks" or "free generators." The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-get-free-robux-easy-2021-game-hack, which is flagged as a known malicious redirector. The document body and heuristics indicate a lure for free in-game currency or cheats, a common social engineering tactic. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9017

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.xyz/app/431946152/how-to-get-free-robux-easy-2021-game-hack In PDF document text
    • http://lib.kesdammedan.ac.id//repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/my-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn 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_003_off00004bc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC5 30728 bytes
SHA-256: b4b2b82ed53dbae5bba92321b4deca97d40de79151504e4606e641b7b93f5101
font_01_sfnt_off00009146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9146 4068 bytes
SHA-256: e0cada39244109bcff4cb604723dd546590a17470b752c6ef429949b2c3e7ac3
font_02_sfnt_off00009f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1A 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off0000ab0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0C 19092 bytes
SHA-256: b4f5bd8c8985fe06cb8cafea7c6a35db41ab3230d9b691422e9309a9df735677

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