Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ba906f2217a16f…

MALICIOUS

PDF

74.8 KB Created: 2021-03-27 23:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 566792c1b1597064f494ece16e88cb30 SHA-1: 9fc0d60dc3a5bdda269df1b82293eda6fce7a9f9 SHA-256: 38ba906f2217a16fce027de9760268b9422830e69f650bf81734255736043ba1
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or malware distribution attempt. It contains a link farm designed to direct users to various external websites, including one that appears to be a search query. The presence of numerous external links and disposable hosting suggests an effort to obscure the ultimate malicious destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=what+does+the+word+tanya+mean+in+english PDF link annotation
    • http://lami-lashes.site/ribonasuruzimukowrtkba.pdfIn PDF document text
    • http://doucheapp.xyz/can_i_watch_youtube_on_kindle_paperwhitel215m.pdfIn PDF document text
    • http://agent-ritual495.online/fluxx_fx3_electric_hoverboard_reviewstcgrc.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/ifxjdha/learn_spanish_free_audiobook.pdfIn PDF document text
    • https://cdn.sqhk.co/keserina/ian8aFj/mom_pregnant_newborn_baby_care.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/hcihjeF/clock_elapsed_time_worksheets.pdfIn PDF document text
    • http://istlan.fun/in_christ_alonelyrics..passion_2013..great_christian_song6pgrj.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/SyibhhT/green_papaya_recipes_thai.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/473720439853z08.pdfIn PDF document text
    • https://cdn.sqhk.co/wemojezuvegi/iiepjfS/fire_flying_type.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/gcjji8i/rajouri_garden_market_map.pdfIn PDF document text
    • http://iclod.tech/princeton_review_gre_book_2020zxo2x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_a1654b5c13cc415a8629d453a2f997d7.pdf?index=trueIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_f7b4bdf4aad9421ab83ce0f32f580ba4.pdf?index=trueIn PDF document text
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_4113a15add1c4b08a7832e38a21b4c8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab023e2-93e6-4a74-8212-0917e40d3dc0/bejeruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f30f46-0bd9-4ec3-acf6-a1a32b9cc135/safajodonozagovujof.pdfIn PDF document text
    • https://6f29901e-f5c9-4775-879c-97b2de5c8d5b.filesusr.com/ugd/0bf195_01788ba2ef024bf0b6f6b60498d766b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb47fc5-bef2-45d4-a943-0510a5e86917/jumping_jacks_in_spanish_google_translate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71410921-c2f6-43a5-9eb9-76f70d14447d/98084049309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80c00c8-5f75-409d-b219-93eb15ecdf30/vafikovagobib.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_off0000e645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 5448 bytes
SHA-256: b2eb9e43f9ccd2a370118bb4c3b5d60c6358536a55864e55315c943afe458e4a
font_01_sfnt_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 11008 bytes
SHA-256: c40a1f486737ae85ab10f02b6697ce0cb2f8281d4ae91c15abe0700de7ecb2b8