Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbaa20ccf1113423…

MALICIOUS

PDF

68.9 KB Created: 2020-12-14 18:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2f037fb3fe362baaaddb8f247d741a0e SHA-1: 6af28f6b10f617e761834163b269a2a4e1ec86c7 SHA-256: cbaa20ccf111342302cfde2169679aba6a3ebd9536eba55d528e1ffe8d26a6a0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and phishing lures. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, and one of the primary URLs points to a suspicious domain 'traffset.ru'. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest an intent to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=el+reino+del+dragon+de+oro+isabel+allende+pdf+gratis PDF link annotation
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/190c50c2b1ebe.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/merivebebake.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/xutef_dikak_kobinakafowumi_tivaguxulep.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/gudomorifura-kukovubi-japalimakuzafem.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/7c57b8da-479d-417b-acb4-fef5cf166472/que_es_el_don_de_dios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c12b92c50b1a1e98b3c9/t/5fc8ca504b97230d05155409/1606994513266/word_master_brain_game_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc132d08787e879896ded78/t/5fcb360f11c29807e6d593b3/1607153168030/forensic_gunshot_residue_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e91e4f-43d5-41bf-9323-041bd9341505/cadran_amperemetre__aiguille.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f050e0-ebe4-4fe0-bda3-6f6ed3f24971/66714509542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd388a1-69d5-40d2-af26-cffdc0ba9e54/dominant_plants_in_ocean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b557e5fa-20ab-4cc4-b4a7-7d4832db864d/free_reading_comprehension_worksheet_for_3rd_grade.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6588f27a199023ada6d7f/t/5fc809915d06c957858ad0e5/1606945169691/munomibogozaxasifelok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0eb8a8b-6762-4d91-a224-94053ca5962b/edge_of_night_soap_opera_dvd.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68f70c6d964583649402b/t/5fca1123ec1d586fb3936166/1607078179600/6707267017.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc394550a2757459bf3c614/t/5fcb3d856fd93023bc020fde/1607155077557/juwagabovut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d12c3dfdd95b60d4a66f/t/5fc71489a3696915e21cfc9b/1606882443640/4209526951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52da513c-3ea8-4560-920d-8f3b08c0fee5/1972_dodge_demon_for_sale.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_off0000cb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9C 5304 bytes
SHA-256: dfc6f5733879042f89095b7202e8eec58f7a7c365943cd77ce242b8c8b7be511
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 12060 bytes
SHA-256: 6c99f24fa6617cf4fe06e1ab7e81adb99d0267e8b94757f3f3e0d75b1d6514cc

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