Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfa07b656bba4cf…

MALICIOUS

PDF

42.5 KB Created: 2021-05-15 03:50:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 87f79ece3f39ea1aed2b6c21f5f0bf45 SHA-1: 46a8c4bf3ed93d1181bd8aeb2a45f32c5149a20d SHA-256: 0cfa07b656bba4cf30c446ce7727ed007309eb321883959cdddfb588890e67ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious domains, disguised as game hacks and generators. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure reinforces the phishing and redirection attack pattern. No scripts were extracted, but the document's structure and embedded links suggest it is designed to lead the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/minecraft-servers-that-allow-hacks-game-hack In PDF document text
    • http://asiasieja.pl/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-buy-robux-for-free_GM431946152.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_003_off00004a4f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4F 25216 bytes
SHA-256: cb60e065f22e69e4363ee7a0fe03544e41e6a2fee11b5c76c91d501c081bf4a8
font_01_sfnt_off000083bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BF 18396 bytes
SHA-256: 9f0f6966d160eb4a8d7c12083ffcfddab2fd99c1ceedc8c822370871be153b2a

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