Malicious PDF — malware analysis report

Static analysis result for SHA-256 72783a729b490843…

MALICIOUS

PDF

44.8 KB Created: 2021-06-04 05:18:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 112dbf5037bdc5f72a787292072dcbdb SHA-1: 48fc6c90a7535929a0342c60d662a06d1b453eb2 SHA-256: 72783a729b4908433677e1bf95e7bf1afb44fd08273c018ebfd5864381bd35cf
260 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and a link farm, masquerading as game hacks and free generators. The presence of an MFA lure suggests a potential credential harvesting attempt or abuse of multi-factor authentication. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious workflow designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.online/app/1330123889/pubg-uc-price-list-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robuxmatchcon_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_off00004d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D97 29576 bytes
SHA-256: 89405620bdfee98063888abec5783a4dfd7a56db8fa672b06748c149440ce45e
font_01_sfnt_off00008ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE5 18124 bytes
SHA-256: d158cb12b1a108bb3a8115b3e2372ec7a08eca757cbfa801b6cbb240db4e003b

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