Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafabac102f9b02d…

MALICIOUS

PDF

38.8 KB Created: 2021-05-20 23:24:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b16d247dc3de9f0186ea314861db611f SHA-1: 835ef326fcce57be6f1958a37ac3a9be36be18b9 SHA-256: aafabac102f9b02dc08c05c72419ae4648385a5c7c2dc88f30b7c17c75ec0631
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically advertising free in-game currency generators. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting these sites. The presence of multiple redirector links and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/roblox-free-robux-no-human-verification-game-hack In PDF document text
    • http://jackson-pr.com/images/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://jackson-pr.com/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://jackson-pr.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://jackson-pr.com/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3282 24684 bytes
SHA-256: b798f103eef9aef660257e11e8b64dbc74f16dcaac75d913e8b8d445f3ffb558
font_01_sfnt_off00006a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A20 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000740b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740B 18932 bytes
SHA-256: 9d302b82f438100f3cf39adb1b208b926e457e77310e02e89ba7e0c774768e38

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