Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0b71de8c29010d…

MALICIOUS

PDF

42.2 KB Created: 2021-05-11 13:05:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c4139fea34a5401cf004b6b4016a950b SHA-1: e1576ef30be509c900f5bbaa72c416de862e2838 SHA-256: 3e0b71de8c29010d483bd82549b325954307759d1eaee87bcb1b95a72ed00a50
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links designed to lure users into clicking on "free generator / game hack" or similar content. The primary link directs to a known malicious redirector, and the document body itself contains a mass of external PDF links, many of which are SEO-optimized for game-related terms. This indicates a campaign focused on driving traffic to potentially malicious sites or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/can-i-get-minecraft-for-free-game-hack In PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/easy-robux_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_003_off00004bbc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBC 25008 bytes
SHA-256: 58e29d05d34c1dcdcbccac9c572ebef0d5440f682a697c1219e214d238e52f0c
font_01_sfnt_off0000843e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843E 17712 bytes
SHA-256: e4c5326dba6bbe04ecfe42fb3576534f1bedf9d9a77461a4c126bff948161748

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