Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff95a7287d40354…

MALICIOUS

PDF

47.6 KB Created: 2021-05-16 18:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d82cf59389801b27bb93dafbfd418fea SHA-1: df0016ea92e96121594070c3a43fcf110a12148c SHA-256: 9ff95a7287d40354e6f51f77371a840b6a08ad464500ca0b24be1c012d6eed84
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and a link farm, suggesting a phishing or scam attempt. The document body mentions 'free faces on Roblox' and includes a link to a 'game hack' generator, which is a common lure for users seeking in-game advantages. The presence of numerous external PDF links further indicates an attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-faces-on-roblox-game-hack In PDF document text
    • http://lamascheradiferro.dk/images/robux-codes_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4880 31620 bytes
SHA-256: 0f1c587995cdb396f3f37d001ebeb76e0073558e8dd28efa8ccd84102d79b7cd
font_01_sfnt_off00008d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3D 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 18444 bytes
SHA-256: 6f560aa272d9aedbef1805ae90d6020cfb19865522838e20e165899e8cb1ee62

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