Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8ff39d4dbb9a49…

MALICIOUS

PDF

43.0 KB Created: 2021-05-21 05:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b88a0ada8418609c579b9ec84ac877cb SHA-1: 5ddf4f693e022794458164d3fc828a9f50938c83 SHA-256: cf8ff39d4dbb9a49a2d62df64631e379a6f9675a90bd8f096d5b07b4894bcef1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, including one that claims to offer a "free generator / game hack" for Minecraft. The document body also contains a call-to-action phrase, reinforcing the lure. The ML classifier also flagged this PDF as malicious. The primary IOC is the redirector URL which likely leads to a further stage of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7552

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/479516143/how-do-you-install-minecraft-for-free-game-hack In PDF document text
    • http://fm-express.de/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://fm-express.de/images/pokemon-go-free-gucci_GM1094591345.pdfIn PDF document text
    • http://fm-express.de/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://fm-express.de/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://fm-express.de/images/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • https://www.youtIn PDF document text
    • http://www.freenom.comHeyIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F4 33192 bytes
SHA-256: eaea2bc2b68de6518233bb8c07bc614615442dd6c6b2e7fdbbb6757108414842
font_01_sfnt_off00007cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCA 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000867c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867C 18416 bytes
SHA-256: cbfa2983e9daac20df1fbb4ff8997c57b22e5209ec416caeaf9e5389c70ab7ce

Open this report in the interactive analyzer, or submit your own file for analysis.