Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1dac294bd96334…

MALICIOUS

PDF

44.3 KB Created: 2021-05-22 22:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a696b576a6603ae3dd09bc7f19e9b981 SHA-1: 5edd9326427ea63315f7529892ecb4adc2f2f030 SHA-256: aa1dac294bd96334473d4d451e33733640de17bfd1e329d4d3e21f3ff42089ae
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 and lures users with the promise of free game items, a common phishing tactic. The document body and heuristics indicate a redirection to malicious infrastructure, likely to download a second-stage payload or facilitate further exploitation. No specific scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

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/free-roblox-accounts-with-robux-that-work-2021-game-hack In PDF document text
    • http://mypizzaoven.com/images/how-to-get-a-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://mypizzaoven.com/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003248.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3248 24760 bytes
SHA-256: 66a581283a8c9400e33b25987246cacfa1bb9588b9714960569f63cc178a6e8e
font_01_sfnt_off00006b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B54 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000077f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F6 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_03_sfnt_off00008834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8834 19476 bytes
SHA-256: 4c7cb67921980cc467a624d7be0aa4f8f19dcdcb8d4cb789adc94de6f70366aa

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