Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ddbe89799b8de7…

MALICIOUS

PDF

74.3 KB Created: 2021-06-10 19:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 563a8c9efa1e64d4cb61cb8aed76e41a SHA-1: aa3e96ef2fc2d49a0dc3c4a412b1abbbb1cdfa70 SHA-256: 09ddbe89799b8de76e29204a5f8695011c139507c2ae8036c5caa812c3d82002
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 hosted on disposable domains, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further support malicious intent. The embedded URL 'https://baarspo.ru/123?utm_term=google+sheets+script+editor+tutorial' suggests a lure related to Google Sheets scripting to entice clicks.

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://baarspo.ru/123?utm_term=google+sheets+script+editor+tutorial PDF link annotation
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/6253643.pdfIn PDF document text
    • https://zisugopijelides.weebly.com/uploads/1/3/1/4/131438068/tagawu-berurabagefil-figukokadev-rezemev.pdfIn PDF document text
    • https://virusogodunaf.weebly.com/uploads/1/3/4/7/134762125/wogelixemavapej.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/63e1e5.pdfIn PDF document text
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/bezumuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460042/normal_60625d1033056.pdfIn PDF document text
    • https://jubuxazule.weebly.com/uploads/1/3/4/5/134585976/2961022.pdfIn PDF document text
    • https://burigazipe.weebly.com/uploads/1/3/4/7/134764527/jojeg.pdfIn PDF document text
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/204631.pdfIn PDF document text
    • https://fujulisu.weebly.com/uploads/1/3/4/0/134042697/bc2c021caed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_60bd167fa3fe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_60511045c065f.pdfIn PDF document text
    • https://tatojevukud.weebly.com/uploads/1/3/7/5/137508330/8960306.pdfIn 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/5d855674-7160-4d72-9d30-0d88f54e7cbe/pdf_mit_paint.net_bearbeiten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb51fd7-a845-4daf-9a40-953002d15c3c/suseribamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111f3bfb-1670-4ae5-9389-a48f5d2563f7/how_to_find_velocity_when_acceleration_is_0_calculus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7bab58-d305-4fd9-a457-5590de0403b5/lawali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e657cca-5b46-489b-8818-319ec6e9b8b4/what_does_the_bible_say_about_visionary_leadership.pdfIn PDF document text
    • http://nukuxim.pbworks.com/w/file/fetch/144508830/82518588935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3856e96d-6d70-4b20-9fba-151dff307674/download_journey_to_the_centre_of_the_earth_full_movie.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144573876/63617330764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7471d82c-788c-4c05-b5b2-d3ed22c7402e/happy_birthday_wishes_images_download_free.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_off0000e681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE681 5364 bytes
SHA-256: dbf8f4b72d6e99af471658412b43d72b551707687244ae1f637a9f2cb030d9db
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 10228 bytes
SHA-256: b8c3375465bfd49bf800c20eb35b78f5ce2a6532dd50f75c9efe29b81f1a8938