Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb5dac30ace1f71…

MALICIOUS

PDF

46.0 KB Created: 2021-06-07 12:34:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9c60ae3be6a4cfbdbd7735a650e48c03 SHA-1: 23c3910714d7cec945e20671d62cfb079e89ae6f SHA-256: 1eb5dac30ace1f7181b82c872bdf3781b510fc13a65357c5881fa46b464726c5
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to appear as "free generators" or "game hacks" for popular games. These links redirect to malicious infrastructure, specifically identified as a redirector. The document body and embedded links strongly suggest a phishing or scam attempt, likely to lead users to potentially malicious websites or download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/buzz-the-bee-free-robux-game-hack In PDF document text
    • http://d-cision.nl/images/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/is-it-possible-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://d-cision.nl/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53AE 29148 bytes
SHA-256: 2d96a35724367978cf823e214379d38299d699c2e181a22db57ad6ece27bf4ae
font_01_sfnt_off00009573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9573 18260 bytes
SHA-256: 19d4e8cef5d43a189608e88f443bc3cdde02134414777ad9f13bcf1ae8b0d3b2

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