Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a19bb5ab0084938…

MALICIOUS

PDF

34.8 KB Created: 2021-07-02 06:17:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 711c4340a59b57b07dc7beb490ffa3ad SHA-1: 59fe859a62307d4faf7b723e998395c4a3a7760d SHA-256: 7a19bb5ab00849380171322243cb80f560ab715be691260367b136621cf96987
280 Risk Score

Malware Insights

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

The PDF file contains numerous links to websites offering game hacks and free in-game currency, such as Roblox. These links are designed to lure users to potentially malicious sites, as indicated by the presence of known malicious redirectors and IP address usage. The document body and heuristics suggest a tactic of SEO poisoning and link farming to distribute these lures, likely serving as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.co/app/431946152/xydia-roblox-hack-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/pink-paradigm-hack-created-by-lord-of-robux_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-somebodys-account-in-roblox-2021-freb-2_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-oprewards_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hacked-pour-avoir-des-robux-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-sound-effects_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/is-there-a-free-trial-for-roblox-bc_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/acount-info-for-roblox-hack-with-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/easy-robux-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-that-thing-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/como-hackear-roblox-2021-en-pc_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-cmds_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-account-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/PDF link annotation
    • 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_off00003045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3045 22600 bytes
SHA-256: dc33ffff89b2b4823b67395587c6a37be1b21d74a51993ffbad547eb2659dee9
font_01_sfnt_off000062b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B6 19128 bytes
SHA-256: 32743250285beb73f05b4e0df2a34431eb9faf20a203f93c2ed60b0b4cbad03f