Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dd8750e874bbe9…

MALICIOUS

PDF

53.6 KB Created: 2021-05-19 11:19:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c65feb8dd99f422cbd61c2adba470e36 SHA-1: 44e84ec284554148770f64859921b029c15c7665 SHA-256: 27dd8750e874bbe990154c9f1990177a0dc030332760c83e9262058f6c6d09d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on domains associated with link farms and potentially malicious redirectors. The document body and embedded links suggest a lure for downloading game-related cheats or free accounts, which is a common tactic for distributing malware. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9017

Heuristics 4

  • 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-1.8-9-hacked-client-game-hack In PDF document text
    • http://algierimasonry.com/images/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/play-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/robloxhacks_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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C36 25964 bytes
SHA-256: 601d50211ac5b9a1f52232f6be26280befb3867104f60cdee2afa9c09ba03619
font_01_sfnt_off000086cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CF 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off00009ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF9 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000ae86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE86 18532 bytes
SHA-256: 397fe146c4cb21b8fa0568cb6b824f44c66529b57f9939d7b0b2fcb40fe95c7f

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