Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cdffc2de1e848e…

MALICIOUS

PDF

81.8 KB Created: 2021-03-18 10:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59c5cecbe5788c238bb846d2af4471cd SHA-1: 9c73c2b60e42b38d4658b78a2ae1f21341f7a3ce SHA-256: c6cdffc2de1e848e270be2818d7785e06a28e5bc2ad6b8a1ef79c125f8a463e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=where+can+i+donate+gently+used+toys PDF link annotation
    • http://lapuxuzogu.22web.org/deziziwuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_602b6fe2e92b3.pdfIn PDF document text
    • http://velimogoliti.iblogger.org/exercice_orthographe_cm1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_600d269cb0a8d.pdfIn PDF document text
    • http://gebomomeza.22web.org/bozekoruwesadivavarut.pdfIn PDF document text
    • http://bawikivogo.22web.org/17317745583.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rananutoto.epizy.com/12_week_bulking_workout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22f5d892-03ac-4161-8e86-00bfb2cb8d4f/73405327835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20db74b-3ec4-42f4-a427-d813e9230705/59738716124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9e3de7-ec33-4243-960e-4b766ee905f4/59255688141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f254684-40ba-4a6a-a4c4-0a8ac19f1a2d/the_crucible_act_1_quote_analysis_answers.pdfIn PDF document text
    • http://vazibitadunowak.epizy.com/array_java_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb211470-6394-49f4-8b96-87ea34f745c7/aws_architecture_drawing_tools_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d556f3a-320e-40a6-a607-6ec34ecfd41f/how_to_use_gimp_2.10_on_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92790828-2d56-457f-82a1-ca632660f542/easy_reading_comprehension_worksheets_for_1st_grade.pdfIn PDF document text
    • http://nejovafejasujob.rf.gd/good_answers_for_how_are_you_doing.pdfIn PDF document text
    • http://nozosikela.rf.gd/fractions_sums_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b219bb4-eb69-4663-a7af-1689cf783584/jim_collins_great_by_choice_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a36a61-a5b9-47c3-904f-eb3fb57f9b6f/que_es_una_composicin_literaria_ejemplo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85eb4103-1e8c-464d-8911-ed7ff1dbd9f9/97054112632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41cc94c-482f-4493-a7e5-ba193f783067/72928060861.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_off00010344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 5316 bytes
SHA-256: 3e8f771b7d2353f41be65e80dd7c50f0f1372ce0f5b5b12164da7e8d8b980004
font_01_sfnt_off00011568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11568 10716 bytes
SHA-256: 0c6314c298d41766f7e52e3fd0e957e9f38b12f8ed56552665a8922529c9feb6

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