Malicious PDF — malware analysis report

Static analysis result for SHA-256 94575625215bb790…

MALICIOUS

PDF

76.5 KB Created: 2021-03-09 18:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e0e8ec0f66026f62f1e1446d4b4363dc SHA-1: 19aaf7fe2cfd156921341ff255e14d5fed661da8 SHA-256: 94575625215bb7900186686922e4f622af4dec803d0ea6084c4c5e76907acf05
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=atarudi+harmonize+video++mp4 PDF link annotation
    • https://cdn.sqhk.co/xinulezebi/dMhedii/sabubojajivuwubigulepip.pdfIn PDF document text
    • http://ig-copyrightnotice.com/umrechnung_von_fahrenheit_in_grad_celsius_formel3j3k7.pdfIn PDF document text
    • http://limons.space/battlerite_change_name4j98s.pdfIn PDF document text
    • https://cdn.sqhk.co/ralofobo/fhfjdgi/21757877798.pdfIn PDF document text
    • https://cdn.sqhk.co/kobamebexog/I6idtQ4/5800007166.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/VgdFAhd/sonic_the_hedgehog_cake_publix.pdfIn PDF document text
    • http://kasyanbeauty.com/578121349608zfik.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/he6ijSe/instant_hot_water_tap_builders_warehouse.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hhfhilo/wesonez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_dbf69a7b2f0f4d71bb60cd154734f929.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/mathematica_fonts_windows.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_a813139ac0844a71a8cd05f87af633f2.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_d662a8ae65d4479a8ff5d138e998027f.pdf?index=trueIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_b745054bffcf436f8ed9e28f06810dd5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/26914449839.pdfIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_2aba3c82a04b4dcd895004f8708368b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/desenaz/what_is_a_mri_guided_breast_biopsy.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/rugowitemalunev.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/20998898842.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC404 5176 bytes
SHA-256: 3bf48860e1764d97366956950f784360bc0f632b509e4d9e5f0b354808fc41a0
font_01_sfnt_off0000d585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD585 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000e0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E8 10996 bytes
SHA-256: 72b411faa5792f9a383ff9a74f8e6e0c9cbf8dfcaceb6a8d2013b5330d53419b
font_03_sfnt_off000106b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 18776 bytes
SHA-256: dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792