Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e571662e2c323d…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 21:45:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b0a157d6b47bec1ac98904735faf8aa5 SHA-1: 74716500528bc8de3eeab1ce5e1a92365740e591 SHA-256: 13e571662e2c323da2201d2c9d7dec0e0377511362b6f9d14571e7c79ed11539
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free in-game currency and hacks, which is a common social engineering tactic. It embeds a URL that leads to a known malicious redirector, designed to funnel users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-no-tix-game-hack In PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-more_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-doing-nothing_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/download-hacks-for-roblox-jailbreak-for-pc_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/redem-code-robux-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-casper-free-download_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-hack-pour-avoir-des-robux-2021-pc_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/border-games-with-free-groups-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coun-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/watch-ads-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-backdoor-to-earn-robux-v3rmillion_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-do-you-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-roblox-accounts-for-robux_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_003_off000063b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x63B2 19104 bytes
SHA-256: 4d8829d624e8754840549f5b8e4685da347061e059661552ac16f20a4a09a768
font_00_sfnt_off0000316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316F 22496 bytes
SHA-256: d7852ee0da794b65dea256f8e32ad92fe5736f3e8dcbc21a1ed139222cd1b1cc

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