Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ba87b272437f3e…

MALICIOUS

PDF

37.0 KB Created: 2021-05-24 04:06:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6f57159fae0a482504af5bde257f974a SHA-1: f22a0cf34d6f84fe56069da7e41baa6b5140e183 SHA-256: 86ba87b272437f3e3acd259751a946bf7bc82451168d045585c338a6c5ae420f
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 masquerades as a "free generator / game hack" for TikTok. The document body and embedded artifacts suggest a lure for potentially unwanted or malicious content. The presence of embedded URLs and the heuristic firings strongly indicate a phishing or redirection attack designed to lead the user to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-get-free-tiktok-coins-game-hack In PDF document text
    • http://dubwar.pl/images/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://dubwar.pl/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://dubwar.pl/images/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://dubwar.pl/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dubwar.pl/images/how-to-get-unlimited-xp-in-pokemon-go_GM1094591345.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_off00003270.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3270 27716 bytes
SHA-256: b5426148909267358012477214d840e9eff758112b5d781373d4367972a66701
font_01_sfnt_off00007191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7191 17620 bytes
SHA-256: 5e08b925a0f8fe2d80e54c1999b1c3763f905cccf1acde0f5739739445e42325

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