Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f2c7f8cd19cbbc…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 16:29:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 28d7118bde22e327e3d36b361af51a30 SHA-1: a44d2469c7dc436f28dfc34e43073ab0e66a0288 SHA-256: c1f2c7f8cd19cbbc1c45a9754a71fa6589bec5d03443bbccfeee32e244a844b2
200 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating a malicious redirector and brand impersonation for credential phishing, specifically targeting Amazon. The embedded URL leads to a site offering "free generator / game hack" content, which is a common lure for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/835599320/tiktok-free-view-iphone-video-game-hack.
  • 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.online/app/835599320/tiktok-free-view-iphone-video-game-hack In PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/roblox-hack-2021_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_004_off00005461.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5461 27216 bytes
SHA-256: e92ae5c45512db77d6f46f793b715098ca9c6f37039bbefb3dfecfac96a44a6a
font_01_sfnt_off0000928f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928F 18272 bytes
SHA-256: 79008d259d53a9d4f8d9b9abdf1e4b2e1346a314a080d7f232d04e595d6bbc38

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