Malicious PDF — malware analysis report

Static analysis result for SHA-256 d931de5931fe86a3…

MALICIOUS

PDF

82.0 KB Created: 2021-04-19 11:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 956419e670dda90aa7798269b2d20824 SHA-1: 4c519adc54f3e5bfe6f795e478cd35c0be03c339 SHA-256: d931de5931fe86a387632a9625e09adc3cf168f6d4c7281151070897083460f8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=what+is+a+pre+1964+winchester+model+94+worth PDF link annotation
    • https://likunemotiro.weebly.com/uploads/1/3/5/2/135299998/5709499.pdfIn PDF document text
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/7563ad7a.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/fubafegujena_nomuradexekava_jumojededelora.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/dodefuk_fugozufopef_kebinutu.pdfIn PDF document text
    • https://terifurarogo.weebly.com/uploads/1/3/4/3/134317228/wiwimilano_merifatefu_vufoxile_lazijila.pdfIn PDF document text
    • https://maposege.weebly.com/uploads/1/3/1/3/131378999/kipojujowop-botasu-ranef-joleb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447662/normal_6044ca778f2da.pdfIn PDF document text
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/9e7c249ad9d.pdfIn PDF document text
    • http://dubifuxukev.iblogger.org/42325475176.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393639/normal_600600340e245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_602ad04991984.pdfIn PDF document text
    • http://momopenuwawe.iblogger.org/ajeeb_kumba_full_novel_download.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/fd9c14d7-0be0-4a06-ac5e-0eed12670229/43880280409.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/5_feet_apart_book_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbd5b97-f8c0-4d50-8a02-5e90c9d8d2ef/fumifuxuveromir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1becf2c3-cb67-478b-a6d0-e8fa2e631ace/ribujapawepomonuku.pdfIn PDF document text
    • http://fukurem.epizy.com/14341151595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5871d612-97ed-4a31-9841-684432e6a2a0/how_can_you_tell_if_a_bird_likes_you.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/hunter_douglas_powerrise_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/35974839239.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_off0001000c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000C 5868 bytes
SHA-256: b753c6b1a7b58d89a4b0b2dff73db54286883191c2a8b731e199cc6012e0aff6
font_01_sfnt_off000113f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F6 10892 bytes
SHA-256: 9e5ba8c933830eb10773f0469ea0df15f887d0f9d8d4d4b972d39819f1b95120

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