Malicious PDF — malware analysis report

Static analysis result for SHA-256 8993100262f3537e…

MALICIOUS

PDF

72.6 KB Created: 2021-04-18 15:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b187127c2aa37e17eea0d2134d745093 SHA-1: 1025fb301525ce762c39b4236827c6eecddc8d8f SHA-256: 8993100262f3537eb29068b44bf7d3d1e9fd29c30baed32760b94bd791157d26
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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=printable+log+graph+paper+pdf PDF link annotation
    • http://nudistoff.club/82876202816ogdzw.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/oialhel/talking_ghost_app.pdfIn PDF document text
    • https://fedobakeruja.weebly.com/uploads/1/3/4/3/134367732/c0d89.pdfIn PDF document text
    • https://fegemuvu.weebly.com/uploads/1/3/2/6/132695633/3c5b0b3bb4.pdfIn PDF document text
    • https://petapizegu.weebly.com/uploads/1/3/4/3/134327096/f9273e930bcb36c.pdfIn PDF document text
    • http://luchdobro.site/apics_cpim_study_material_freedt6fh.pdfIn PDF document text
    • https://sibuzowad.weebly.com/uploads/1/3/2/8/132814892/sinetasojorewerak.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/bPjhhez/mount_fuji_sunrise_tour.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/TGjeebV/can_you_iron_perler_beads_without_wax_paper.pdfIn PDF document text
    • http://www19216801.site/69764628709qeerx.pdfIn PDF document text
    • http://datingsexchat.site/9190782966dk40a.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/if6hihf/hotel_new_york_disneyland_paris_restaurants.pdfIn PDF document text
    • http://reestr.site/68464997249r2v8e.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/Qh8hihf/lexanipibujunakutowaxitod.pdfIn PDF document text
    • https://ralanuda.weebly.com/uploads/1/3/0/7/130775203/641caf2c7a20b.pdfIn PDF document text
    • http://nerroba.info/822202230368ngwn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_90f7b39be3124a74aea466153764fff2.pdf?index=trueIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_20529e8830364f33b5d0b57bb06b5b67.pdf?index=trueIn PDF document text
    • https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_f630997763a54438b93c8a67f344f4e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/beats_by_dre_powerbeats_pro_wireless_earphones.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/gevamixiside.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE063 5264 bytes
SHA-256: ef5b24dff5b6989df1108c365daa7c6cbd3ac866d0841d1c34673d681230a048
font_01_sfnt_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 10348 bytes
SHA-256: c5d43766d993f21fc03d992143cbce24f766f3632335fe6998767d99bfeeabeb

Open this report in the interactive analyzer, or submit your own file for analysis.