Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b2bdf0e2105df6…

MALICIOUS

PDF

71.7 KB Created: 2021-03-31 13:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 870feb396f5181680ee43795aab36d2a SHA-1: 94c216f6c78431311019dd8899290d274726641b SHA-256: d2b2bdf0e2105df6819d3e5f14b363939c63784c653b9699487eeb11f5bda579
186 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 disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious activity.

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://botokaw.ru/strik?utm_term=maggiano%25E2%2580%2599s+reheating+instructions PDF link annotation
    • http://azakalaza3.xyz/78760878541ucpoy.pdfIn PDF document text
    • http://zewenidasi.iblogger.org/57770377510.pdfIn PDF document text
    • http://tryadasert.online/lonigaxawugunisoguxutetfcbqb.pdfIn PDF document text
    • https://ydneurt.taxi-victorya.ruIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e33d25-4f2f-4835-a310-5f4e663a4d53/36567934771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916cee07-00bd-4875-95a5-9f1d4de42ad6/7709159316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e7371a-9d37-4f37-94fb-ce1dea31f6ee/67714573447.pdfIn PDF document text
    • http://talaxevavilur.rf.gd/lettering_templates_for_applique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033139f4-287b-452d-bd1a-2b3cffb4c7d7/which_bts_member_is_the_kindest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1667bf55-5d73-4c5e-b215-b19aacc49099/interior_design_schools_in_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/bivafasezazitevomav.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/a._x._l_full_movie_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/java_7._79_filehippo.pdfIn PDF document text
    • http://niguwez.epizy.com/approximation_algorithms_for_np_hard_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07678e57-8bd6-46cd-b2cc-f39a33b16677/84429233971.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/91035494909.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/crystal_reports_2016_trial_key.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_fe68c0284b754970b907931a828ad08f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c23663-dd23-42ce-a653-30896987004a/ejercicios_resueltos_limites_2_bachillerato_ciencias_sociales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e800c74-bd82-455a-9be8-a10b5517058b/batman_comics_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dcd071-611c-420c-a015-84171d1d7a4a/2007_jeep_grand_cherokee_laredo_lift_kit.pdfIn PDF document text
    • https://cabae152-0d18-4cc7-9545-8711a89e332e.filesusr.com/ugd/607e04_868015bbd19a42bf95d5e9b146f9ddbb.pdf?index=trueIn 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_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 5084 bytes
SHA-256: debc693c3a65f2d926be5625be88a4bca88b7b6371f255e022763f9ba6980155
font_01_sfnt_off0000e961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 11296 bytes
SHA-256: aef014792f616777ea0ba81d33ad2b41a1a87c325e2a4799e356388e26ab3197