Malicious PDF — malware analysis report

Static analysis result for SHA-256 af449e32e2b46892…

MALICIOUS

PDF

44.5 KB Created: 2021-05-12 23:45:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2a89f67ea50283029fe25d616d377d15 SHA-1: 0a2f241136314ab9d223b86ef9af61d8d18d3b8a SHA-256: af449e32e2b468921f5adf500246c0c78f2a553de1c85cab911ed1831d8c07f8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and a link farm, disguised as 'free generator' or 'game hack' lures. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary goal appears to be directing users to malicious infrastructure, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/easy-free-spins-coin-master-game-hack In PDF document text
    • http://smkn1salatiga.sch.id/library/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-do-you-hack-minecraft_GM479516143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004944.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4944 25040 bytes
SHA-256: 99d2793492830646a00398b37b51d7006a2eb2a36e4666837af3c462ab8a9b5d
font_01_sfnt_off00008248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8248 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF9 18068 bytes
SHA-256: 2b5bcb60036e8604cee537a76a0c1d845177aa2c28f1eb7ce8b27015c89bb61f

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