Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a1c27ce3e5e0ee…

MALICIOUS

PDF

86.7 KB Created: 2021-04-08 22:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fe0b37070a14e3e05a0ca277efeb6dab SHA-1: bfe573dc505ac60a28aaae8fd2a427887805d2d3 SHA-256: 88a1c27ce3e5e0eed8ba5b4595feec271893445ba9e62b76428f6d555870de30
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://jottigo.ru/strik?utm_term=strengths+of+co-teaching', appears to be a malicious lure. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=strengths+of+co-teaching PDF link annotation
    • http://wagugekewa.22web.org/gofetuvotijujoba.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/equidad_de_genero_unam.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/tratamiento_no_farmacologico_del_alzheimer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekapiv.epizy.com/curso_bsico_de_economa_de_la_empresa.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/towopipadiwimuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/megowetigozubiduvorakepe.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_dbd65e01005d45ff8300149a8500ab81.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e700418c-8230-4eb1-9b0f-803dbc6dc78e/9579072451.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/myron_mixon_barbecue_sauce.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/my_talking_angela_2_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4194eae4-2335-43ce-890e-8f2b2a52cae5/keyboard_layout_elite_dangerous_profile.pdfIn PDF document text
    • http://benipibidi.rf.gd/liste_adjectif_qualificatif.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/onkyo_ht-r340_how_many_watts.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/computer_accessories_price_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e0c341-7aff-4ecd-a064-75e3be2bbd69/vupisibopaze.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_aafbb86033454cf09aa9c98f9846e847.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedexim/how_to_replace_battery_in_garmin_nuvi_205w.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/30191924971.pdfIn PDF document text
    • http://murarefap.epizy.com/plural_possessive_nouns_worksheets_2nd_grade.pdfIn PDF document text
    • http://junulewit.epizy.com/antecedentes_no_penales_puebla_formato_de_pago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3b631b-7065-486b-b2b5-610e58ecd639/pukag.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_off00011689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 5248 bytes
SHA-256: 7ae7e4b173d41bcbda96ffe9b3de25fdb717e80824e40e2654e17476b8df43fd
font_01_sfnt_off0001286b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286B 10940 bytes
SHA-256: 3ce678534c4808adaa4389d0913c56c7255aabdcae770b6de3b1ebe1fbe23fc4

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