Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef946f498e3f825…

MALICIOUS

PDF

77.6 KB Created: 2021-03-21 04:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d4e42a4832faa3b14411d35515e4e9f3 SHA-1: 35feac82bc40a1098c99a4c3b364903d9458fdf0 SHA-256: eef946f498e3f825483ab7820f79bda3b90f0d6a9aceb364f349ba2d20321531
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall heuristic profile points to a likely phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=suburban+rv+water+heater+instructions PDF link annotation
    • http://prizinsta24.online/b_arch_question_papersm0ek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_600fb6d7939da.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/jIihjjQ/xulovupoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485152/normal_5fe0032f5f22a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_6048c1708d246.pdfIn PDF document text
    • https://cdn.sqhk.co/kamavedes/hh2eJTn/1071979113.pdfIn PDF document text
    • http://jubevodume.22web.org/76251248653.pdfIn PDF document text
    • http://resimpub.com/90172789938ulphe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_604b9e4e509c0.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/tCjgiaf/keferiw.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/0748c587-4ce6-4701-bdf4-3d5c2d674af5/subject_verb_agreement_quiz_for_grade_8_with_answers.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_fe3f08de9317411c8437e5ad8c31b6c6.pdf?index=trueIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_c4da1a684db14634afcb04f4ad2d8b92.pdf?index=trueIn PDF document text
    • http://mawabubobiniz.rf.gd/16238207200.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_f5e30d0a95714b6393acc82b7ad348d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc970b8-b3e2-478b-85a3-414759340158/what_caused_the_agricultural_revolution_in_britain.pdfIn PDF document text
    • http://lijazujarakowom.epizy.com/coffee_roasting_temperature_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31396502-63fc-4764-a4e9-0033a825ea97/bulule.pdfIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_d239efa3909e4245827731cfb93fbced.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a6201e-c89a-4f08-92cd-6ed313cd7a17/mezob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fdd1b11-c15e-4021-9056-fad7284e3b83/how_to_access_sharp_tv_menu_without_remote.pdfIn PDF document text
    • http://pimifemegizak.epizy.com/adnan_khan_photos.pdfIn PDF document text
    • http://peworesafasar.epizy.com/wawutupidinalewoselo.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_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 5252 bytes
SHA-256: abc3e1322b4bce3daba6d0e42b02b52df154d4f504e1e3ceea4e41a24cc31b23
font_01_sfnt_off0001046a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 10780 bytes
SHA-256: 5627d89f83804fe747bbc88df7b937558440abe19d16ec75f384a598c70a2a54