Malicious PDF — malware analysis report

Static analysis result for SHA-256 710422781c32b28c…

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 12:05:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 89f19af92bd79a98e256a918652fd714 SHA-1: 6fee5bc416409ed074e930d23e297cbcd247b846 SHA-256: 710422781c32b28c2652b355a70aa1674a846ec78918a0061d7424d257d9220b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' and 'game hack' lures. The primary link directs to a known malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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/free-robux-gift-card-generator-game-hack In PDF document text
    • http://uptodate.az/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/www-robux-com_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://uptodate.az/images/pubg-uc-94fbr_GM1330123889.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-invite-friends-hack_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_off000048cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CD 25972 bytes
SHA-256: 0a36c09414176c481f753dc298e9d56fa4ab40d8c2c9dc53ad160c1df86e6a45
font_01_sfnt_off000085d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D8 18640 bytes
SHA-256: 9c31dcaac4a0b50b5f0fc2170f059f54bc5506f6c6606d446db32e5f0aacf3a6

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