Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e65f0eaf810903c…

MALICIOUS

PDF

40.8 KB Created: 2021-05-10 11:38:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c82c98c6b2522875a884c1a4c88998a1 SHA-1: 6403a830ec858a4dd496f1652428f592962b3c89 SHA-256: 3e65f0eaf810903cc75ab6f5653ce574adb493fbab071012ec20b3ce421f9a12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body also contains similar lures and embedded URLs pointing to potentially malicious content. The ML classifier also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8538

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-to-get-free-skins-in-minecraft-game-hack In PDF document text
    • http://sim.mafutuhiyyah2.sch.id:8094/__statics/gudangsoal/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://sim.mafutuhiyyah2.sch.id:8094/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sim.mafutuhiyyah2.sch.id:8094/__statics/gudangsoal/files/rbx-robux_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_off00003a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A56 25800 bytes
SHA-256: 1d1ec21f0aa2331a4982aabad2b2cc79c783c26f4fe4caae27f202ec1d35715d
font_01_sfnt_off0000747d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747D 2976 bytes
SHA-256: f01acc160ef1393137cd7a90315dbabef2de3b2672caff7b486b43975190684a
font_02_sfnt_off00007ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBB 18044 bytes
SHA-256: 6cc59c28d5557832b1af72f7b0f143d8adff3a85e9aacd177c0586c4e7a11f45

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