Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e92dba9e50bfbf…

MALICIOUS

PDF

40.9 KB Created: 2021-05-14 10:15:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e765bb506d87348febe162125182a72e SHA-1: ed549e1de788d55467150dbc227d88268a78cf75 SHA-256: 70e92dba9e50bfbf0b75f21945f451be15dc09f9373c67129b22cfa2035d6e69
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, impersonating brands like Facebook to lure users into clicking. The document's content and embedded links suggest a credential phishing or scam attempt, likely leading to the download of further malicious content. The ML classifier strongly indicated maliciousness, and the presence of redirector links supports a high-confidence assessment.

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.
  • 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.xyz/app/406889139/is-coin-master-free-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.xyz/app/406889139/is-coin-master-free-game-hack In PDF document text
    • http://unilin21.ru/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/robux-generator_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/blogspot-coin-master-free-spins_GM406889139.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_off000046a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A4 24948 bytes
SHA-256: 2b91a3e4f3f1ce76a5db11d5aae24daa269c5f3594dde7cb7bd1116a0089022b
font_01_sfnt_off00007f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F41 17712 bytes
SHA-256: 22c3a497f096f7cfd0c016656a28f48d4ef3a3357dd0b23db76023e58fde53c0

Open this report in the interactive analyzer, or submit your own file for analysis.