Malicious PDF — malware analysis report

Static analysis result for SHA-256 159af7f68cbb5111…

MALICIOUS

PDF

39.5 KB Created: 2021-05-21 11:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f4b2075563028e485e7b3c2f28a15293 SHA-1: d447260271a1443d4bcb5bc8336ea9254af570a8 SHA-256: 159af7f68cbb51112861a4ca7cc39482468c7375f5ff6004daea8da70fab507e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body and embedded artifacts suggest an attempt to trick users into visiting these sites, likely to download further malware or engage in phishing. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate a malicious redirection workflow.

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/robux-free-com-game-hack In PDF document text
    • https://newenglandafs.com/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-on-iphone_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
stream_002_off000031f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F5 27984 bytes
SHA-256: 26e23e3288f703a50cd70c0de0b1adac188eb860855767a93914fcbc0b7a2894
font_01_sfnt_off00006ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECC 2976 bytes
SHA-256: 3789135e37d9714b24055a84ccc8042ee13d52c7a0e9e0e8e5f787af57f0f966
font_02_sfnt_off00007920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7920 18276 bytes
SHA-256: 0fd65c317a1abc649e3faff400e4768e1aa7d1dd6ac5589c15474ffa47aab2c1

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