Malicious PDF — malware analysis report

Static analysis result for SHA-256 732a0045cf329903…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 02:47:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f0779617e2ac418b56fc343794314316 SHA-1: 610cde22b3169d979354ada9869bf408b92f25e3 SHA-256: 732a0045cf329903a0aed8bab69649d67e9173ac0d37a22b1f8064e4e1c18397
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links designed to lure users to scam websites, including a primary redirector for 'free generator' content. The document body and embedded links indicate a phishing attempt, likely distributed as a spearphishing attachment. No scripts were extracted, but the extensive link farm suggests a high-confidence malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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 http://netcdn.tw/app/406889139/free-gold-cards-in-coin-master-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/where-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-9db_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-bloxbux-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-you-hack-roblox_GM431946152.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
font_00_sfnt_off000032de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DE 22592 bytes
SHA-256: 62e6bf4665bd649d7e135c31dbde847d3c780fbfa466d125dd4caf44046eed1c
font_01_sfnt_off00006542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6542 18244 bytes
SHA-256: 195128aa3723aff8a9f36dc7538423252c9f71b41e31ba71a2b9093fe1fc8e71

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