Malicious PDF — malware analysis report

Static analysis result for SHA-256 38be8ca95e9f358f…

MALICIOUS

PDF

77.7 KB Created: 2021-03-30 21:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 199b40eaa5f3c175279e331ef7482295 SHA-1: 206811db9e9db19afd7a4d92c00560d11e768939 SHA-256: 38be8ca95e9f358f4a8cbe948bd12333c5e29cb754720e5ab85fd6aee8e787da
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with many pointing to disposable hosting. The presence of the ClamAV detection 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score strongly suggest malicious intent, likely for phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to potentially malicious content.

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://soxebez.ru/strik?utm_term=do+political+views+matter+in+relationships PDF link annotation
    • https://cdn.sqhk.co/matajikiwov/jdfw2zf/bebowizawukarot.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/jiXKijy/vazafokixiveladino.pdfIn PDF document text
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/pesez-ladifusera-moxug.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/jggeKHh/14272541922.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/35784821084.pdfIn PDF document text
    • https://cdn.sqhk.co/pozusawaja/gkEpdjb/83189026620.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/ijUgdlU/64004888359.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/4321191.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/id4vChi/72738800845.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/85940487112.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/fM0hhie/gamer_s_guide_season_2_episode_7.pdfIn PDF document text
    • https://cdn.sqhk.co/vuramufef/kjcgdYx/jifebu.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/4yIjigh/likert_scale_survey_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/gjZUheD/lg_xboom_go_pn7_review.pdfIn PDF document text
    • http://pibumutibol.22web.org/35211447571.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/rghWigg/sling_puck_amazon_canada.pdfIn PDF document text
    • http://bowifazalek.iblogger.org/algebra_1_linear_equations_test.pdfIn PDF document text
    • http://lugodapamaj.mygamesonline.org/what_are_the_different_roles_in_a_project.pdfIn PDF document text
    • http://duboxol.iblogger.org/data_warehouse_vs_data_lake_vs_lake_houses.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boxijekew.atwebpages.com/similar_triangles_questions.pdfIn PDF document text
    • http://jufabopijogik.rf.gd/sukifagodeponax.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_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 5324 bytes
SHA-256: 2af597b3aeb737468043a14d70df1aebda1dbdd4c221b2d64584c748164d215f
font_01_sfnt_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 11144 bytes
SHA-256: 6b62b72457be218d886e511c55da928ffa71547a965918eeb0ed02bdf0451f1e