Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5ae66a2363898a…

MALICIOUS

PDF

41.5 KB Created: 2021-05-16 14:59:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 10867bdc9cd82523c3f0c2406b170cf0 SHA-1: ea60dab35f2aecefdcd8d9ebdf2c0433a2ec4904 SHA-256: ad5ae66a2363898aa4358a74fbfc29a7a82e1ce56a0034195138e2a20551e00c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on 'alarmed.pl' and appear to be part of a link farm designed to attract users searching for game cheats and free in-game currency. The primary redirector URL, 'https://netcdn.xyz/app/431946152/robux-in-game-hack', is flagged as malicious. The document body, though heavily corrupted, contains references to these lures and embedded URLs, indicating a social engineering attempt to drive traffic to potentially harmful sites.

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.
  • 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.xyz/app/431946152/robux-in-game-hack In PDF document text
    • https://alarmed.pl/images/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-robux-real_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/coin-master-download_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/coin-master-free-pet-food-links_GM406889139.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_off000048e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E6 25324 bytes
SHA-256: a1e615fa65b95eccd86f80098ad1fa58761f4861e6d8a6b6346920fdc9b0132d
font_01_sfnt_off0000813c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813C 17852 bytes
SHA-256: 7ee051f4e2d26a9a04c66646782e9314ee13ce973b90acfdb1eca38aa40a5769

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