Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d8c60f9e1b8825…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 12:27:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 76a6303019d89c22164c79b9ada21d9b SHA-1: b5e62b54214e0efb54d4d2aa5905f86686c205cb SHA-256: d7d8c60f9e1b8825a4f3bcf24b58cd9fdb6b7e8f69985f7ee343bf4576bbb1ef
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as game hacks and free resources. The document body and heuristics indicate a lure to download or visit these sites, likely leading to further malicious content or exploitation. No scripts were extracted, but the embedded URLs and redirector activity are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/479516143/free-minecraft-mods-game-hack In PDF document text
    • https://www.insol-europe.org/uploads/files/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/pokemon-go-free-no-download_GM1094591345.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-to-hack-to-get-robux_GM431946152.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_004_off0000566f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x566F 30120 bytes
SHA-256: 58a297f4e43e0a0118f13832e7ca94dd0ef119e345bf74cd13bafe2e21b88921
font_01_sfnt_off000095fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95FE 17884 bytes
SHA-256: adaa6c4c94b3243dd254ffbddf76305537cf905bb6459c29a6343236798c761b

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