Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0f2fea0ab0eea4…

MALICIOUS

PDF

36.0 KB Created: 2021-05-25 07:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7cfac13c1b9b7e9a6ccbfce32ebb2f32 SHA-1: adf682d5e604e14a124754ece08c9e77c8031a2e SHA-256: 3f0f2fea0ab0eea45f2c659bcd56b281d23bf03ed4fb737f4a7c8d0a647654e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, one of which, 'https://netcdn.xyz/app/406889139/coin-master-free-spins-link-today-instagram-game-hack', is flagged as a malicious redirector. The document body and heuristics indicate a lure related to popular games, aiming to trick users into clicking these links. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/406889139/coin-master-free-spins-link-today-instagram-game-hack In PDF document text
    • https://www.laarsenco.nl/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/minecraft-survival-free_GM479516143.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_002_off0000338c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x338C 23664 bytes
SHA-256: 5a168dd91b6a558eded5807677d877c51fd97fdc8509df5e46d9e4302e36b5eb
font_01_sfnt_off0000695a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695A 18960 bytes
SHA-256: c3cae131f36bdfe9c813bd150295f39ca0ceeabf3546a2df254cc03f93d9c6e3

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