Malicious PDF — malware analysis report

Static analysis result for SHA-256 1570bcb7bc88a992…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 09:11:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 700f0fe933f1e58fae974ba9a0a908df SHA-1: 6b213aa6ce7c8c6b7355bf98b91401f4e213ea63 SHA-256: 1570bcb7bc88a9928f1f922fae394848401b1508056c01071a36a39b897dca0d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are associated with malicious redirector infrastructure and SEO link farms. The document body and embedded links suggest a lure for game hacks and free in-game currency, a common tactic to drive users to malicious sites. The presence of multiple redirector links indicates a high likelihood of leading users to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-wurst-hacked-client-game-hack In PDF document text
    • https://123nhadat.net/upload/ckimage/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B18 25436 bytes
SHA-256: f0744dc8ee712c07476fea18a5b67eda82e9d35c915bca3f78b744cac7f4fe88
font_01_sfnt_off0000853e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853E 18324 bytes
SHA-256: 7137e4e2e9658b649895b635d5af54e9ac78bb5b6b308aaf2a8e981e2e5df966

Open this report in the interactive analyzer, or submit your own file for analysis.