Malicious PDF — malware analysis report

Static analysis result for SHA-256 c291d18f9ed112d4…

MALICIOUS

PDF

48.2 KB Created: 2021-06-07 19:32:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 83af0364aae79d5d0994973b1886698b SHA-1: 14a7a1f7f0568b24a1449316b1933085707872d4 SHA-256: c291d18f9ed112d442be012da84f6e9e1876db94e007549659409efde8ed78c4
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. These links redirect to malicious infrastructure, specifically identified as a redirector, which likely serves as a gateway to further malicious content or downloads. The presence of multiple SEO-optimized PDF links suggests a campaign to distribute malicious content through deceptive search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-free-money-in-jailbreak-game-hack In PDF document text
    • https://eleganceautospa.ca/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-poke-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-lua-free-executor_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/pokemon-go-free-money_GM1094591345.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-codes-2021_GM431946152.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
stream_004_off00005365.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5365 26252 bytes
SHA-256: 71761104158ce500133ddf88d6bdb321f2c33a49d16933bf334119f36e84e756
font_01_sfnt_off00008d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D91 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000977c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977C 19008 bytes
SHA-256: 21cdd671548acbddd0da5612fd2e3f4ce13c6c1016f7a41714f07a285fc27c8e

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