Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6f28820e30ddb7…

MALICIOUS

PDF

35.2 KB Created: 2021-05-22 19:16:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c52b7655fc28f2e5361fc311c101cc40 SHA-1: a8c629bb27bd839b2edca746e7570d5f7b4a193f SHA-256: ad6f28820e30ddb786bd37aaf70f1d3ede59a8bd69e79890f94d442222a13781
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to redirector domains, including one specifically identified as a 'free generator / game hack' lure. The document body and heuristics suggest the primary intent is to trick the user into clicking these links, likely leading to the download and execution of a malicious payload. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/835599320/tiktok-free-views-game-hack In PDF document text
    • https://www.ausecus.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/pokemon-go-free-mask_GM1094591345.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-claim-free-spins_GM406889139.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_off00002e13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E13 26268 bytes
SHA-256: 1bd788f56b52a482a1bfb676e27e57ab7afa5dae11d0e0203a1b639c34ff3dc2
font_01_sfnt_off0000698f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698F 17752 bytes
SHA-256: c0458c8281c5f614ec80a73af60f82da894f7f0cb4b38fcd4688d4eb1216e853

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