Malicious PDF — malware analysis report

Static analysis result for SHA-256 93951daa999b5fe0…

MALICIOUS

PDF

82.9 KB Created: 2021-02-26 07:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3bdb5e234dcf36f80928eefb50829f95 SHA-1: abaa6d13be7ec2d66dea0fbcbc667cca9a000e5d SHA-256: 93951daa999b5fe02b82290abb6846122352d648380b7d7096b85353a8f5ae60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to suspicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers strongly indicate maliciousness. While no scripts were directly extracted, the PDF structure and external links suggest an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://druttle.ru/123?utm_term=transversal+city+project+geometry PDF link annotation
    • https://dudixugodibemuf.weebly.com/uploads/1/3/1/4/131406925/pipovipikomux_vofexorijavipiv_zisojof_zonafamukegu.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/aLiejeU/pixel_gun_3d_hack_no_human_verification.pdfIn PDF document text
    • https://xefomivor.weebly.com/uploads/1/3/0/8/130814633/2471491.pdfIn PDF document text
    • https://pipedexow.weebly.com/uploads/1/3/4/8/134852679/malonese.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/jegjaES/house_lobby_pop_design.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/9lZjihh/zeus_daughters_names.pdfIn PDF document text
    • https://cdn.sqhk.co/desavusomo/ggG8mhc/26118207826.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/xigagod.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/hfWhiEd/misamawedelovelubux.pdfIn PDF document text
    • https://cdn.sqhk.co/jilowepe/D5djigf/galaxy_wars_squadron_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/WVetTLc/38287499969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/44820361878.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/hitachi_dvd-_rom_and_cd-_rom_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/37461136913.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/274509860.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/backup_my_android_phone_to_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/rametisulofulusaginitawav.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/spongebob_beginning_theme_song.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off000107af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AF 5440 bytes
SHA-256: a4a9426f07f17048d6c475c217e605166e9cbe1b62ba4366404b9400e1df8dcb
font_02_sfnt_off00011a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A33 10436 bytes
SHA-256: f3b509f3c0a7b940ab40b3bcc5cf7cb82dca8dc905e6c9cdf7544e6b5cd84403

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