Malicious PDF — malware analysis report

Static analysis result for SHA-256 a060cc2b2ca40dbf…

MALICIOUS

PDF

43.3 KB Created: 2021-05-12 15:03:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3822017d441695540b17bbbcba50943d SHA-1: 6ac8baf5e47eae8b7c67478b917195eb00818386 SHA-256: a060cc2b2ca40dbf11c168751025378217b4da575121e214296a8690983ed192
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links designed to redirect users to potentially malicious sites, disguised as game hacks or generators. The heuristic firings indicate the PDF is part of a link farm and uses known malicious redirector infrastructure. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering lure to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/how-to-earn-free-spins-coin-master-game-hack In PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/robux-miner_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/master-game_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/free-robux-rewards_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
stream_003_off00004eee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EEE 25236 bytes
SHA-256: a6e869aacff24fc02e2304f199ed173bbd0506ba6260aa761ad32e2735bda595
font_01_sfnt_off000087c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C0 18052 bytes
SHA-256: 3c90058a0459d49c606198fd695e9726967f61199941b7ff7c4219412436d59a