Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c072b43f8fbee66…

MALICIOUS

PDF

85.8 KB Created: 2021-03-09 02:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ab04e1918b6fbe0d14fc64636f477e1d SHA-1: 55ba0962635bed9d468ef5f7f35f4d6edb135606 SHA-256: 0c072b43f8fbee66b808cb8599c118732da6e542fe03d19a44afd47157f3a75c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm designed to host numerous external URLs. The primary malicious URL, 'https://maypoin.ru/award?keyword=seaworld+orlando+map+2020+pdf', suggests a phishing or scam attempt disguised as a search result. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/award?keyword=seaworld+orlando+map+2020+pdf PDF link annotation
    • https://sifajovu.weebly.com/uploads/1/3/4/8/134874608/8732362.pdfIn PDF document text
    • https://munopufunorari.weebly.com/uploads/1/3/4/8/134881547/tororuneloleketejuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_601b727a4357e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478669/normal_5fcbe5343ba64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412891/normal_60146ec92b6ac.pdfIn PDF document text
    • http://galirugubosel.iblogger.org/maxexuxudilaxoxidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_603802987e687.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/ruriboziwi_benefek_xivonifokizes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453333/normal_6046b7c3b48b8.pdfIn PDF document text
    • https://sumijiluwovoj.weebly.com/uploads/1/3/4/2/134266387/6764755.pdfIn PDF document text
    • https://mikuzowadakan.weebly.com/uploads/1/3/1/3/131383480/787753.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/ae6e0cfd-4d4b-4b9d-ac69-e892f37b163c/apc_smart_ups_2200_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/what_functions_does_the_left_side_of_the_brain_responsible_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6aff00-cecf-425d-bff7-30d444bbd464/sheriff_of_nottingham_disney_voice.pdfIn PDF document text
    • http://vujipopeb.rf.gd/will_bluetooth_keyboard_work_with_ipad_pro.pdfIn PDF document text
    • http://janizopug.epizy.com/94629051942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a153fc4e-2f1a-47dd-9346-2c40134b894e/sovev.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/wings_of_fire_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69647751-938c-4158-8e0b-67035f83b541/how_are_lennie_and_george_first_described.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/geometric_sequence_examples_with_solutions.pdfIn PDF document text
    • http://zomusuxine.rf.gd/correct_answers_for_tesco_questionnaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ea7185-e8bf-483e-a182-e8d692bfd6d6/c_pass_reference_pointer.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/laxcrossword_answers_for_today.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_off000110fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FD 5480 bytes
SHA-256: dfca0e8325c89e914e23ebb8443b9241e4108200b576b89d1d3cbe1b21114ba7
font_01_sfnt_off0001239c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239C 11436 bytes
SHA-256: 3ade0cde506e96225a728bbb9ca0939e46389961e39b8d1ba6759f1a757d8709