Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b0bc3dbdec1c35…

MALICIOUS

PDF

35.3 KB Created: 2021-05-21 18:11:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4da32dd79e5d7058ca40296dcb5654a2 SHA-1: dd46afda913bf32035e67cb8fe494350080e6c10 SHA-256: d2b0bc3dbdec1c350ada3d3281ebf6fda00798ec67a7bed0c88fe2c4189437ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'free Robux' or 'game hack' lures. The document body explicitly contains a call to action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', further reinforcing the phishing pretext. The embedded URLs suggest a phishing campaign aimed at users seeking in-game currency or advantages, which is a common lure for credential harvesting or malware distribution.

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/431946152/free-robux-picture-game-hack In PDF document text
    • http://unifieo.br/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/free-hair-roblox_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_002_off0000308b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308B 24384 bytes
SHA-256: e3db9822d0ccb39593bc9014f95a94d3f04b8debfc9b79c133ea72b3730b756b
font_01_sfnt_off00006838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6838 18392 bytes
SHA-256: 34b0e3a58c66b2af54b16d5c8d734c4555ce81663a4a6734022a64244545498a

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