Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0142c7805691406…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 09:01:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 934514b5e17df458c95a6847a7025839 SHA-1: b9732b4eedb372795ea5bbe0916600d9fe3b8ba7 SHA-256: a0142c7805691406ecebd17d152ecbb367539e73507cf3d5b5352adc08a2f28e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, designed to lure users with promises of free game items or hacks. The primary link redirects to a URL associated with game hacks, indicating a social engineering tactic to drive traffic to potentially malicious sites. No scripts were extracted, but the presence of embedded URLs and the lure suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • 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.
  • 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/431946152/cool-free-roblox-outfits-game-hack In PDF document text
    • https://www.andrology.co.uk/uploads/files/files/without-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53FD 25404 bytes
SHA-256: fdffdda52df78b42a6a89f8772087e6afbd5cf456c34df3309f81198829b83b2
font_01_sfnt_off00008dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC6 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6D 18312 bytes
SHA-256: 417c7b24102dcc08af0a4c58268c6a25298d4645c7c37a471affeae5ac7401c6

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