Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62ed86ca0a8248e…

MALICIOUS

PDF

44.6 KB Created: 2020-10-26 11:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 6b044a84e123ecfb9c3ae009675d9edf SHA-1: 2b70a03d4ac540557c85609a949608587c42f97f SHA-256: d62ed86ca0a8248e39e9199536a07aa874ec827c5c7dc86ab9ae10d9f8b8be8e
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to downloading a book, likely a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=agile+project+management+for+dummies+2nd+edition+pdf+download In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/1c8c227.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/mawuloze.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/3409757.pdfIn PDF document text
    • https://bulipabuwalo.weebly.com/uploads/1/3/4/1/134131868/fufofiduxowi_fonojujuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/84796287886.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/all_logic_gates_ic_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/ncc_c_certificate_exam_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/jewiwerigiji.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/fiwunomepuga.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/english_typing_book_file_download.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/descargar_cuento_el_almohadon_de_plumas.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/vamuritokisipejijaka.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/10868031430.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/al_quran_sindhi_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/95983949868.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/senior_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/mapixevubupipofeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee694678-50ad-4a1a-a11d-765533b8facd/vuvufiwivumonoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a5e8b2-4de2-4297-af34-c71370153738/funomefuboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8ce0dc-66e9-4c98-ab1e-a9341d4c49cf/viwowepotefokozofak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1213519f-03c3-4e32-a2f2-09f412917326/29628843666.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_off00006b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 5764 bytes
SHA-256: 1dcaf5601f74ae795a3e40172b7c1fcd19df376ac0c650c50ca860049a50c826
font_01_sfnt_off00007ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF0 11456 bytes
SHA-256: decbb9771f053144d0ce5b01bf3ad1c308611d5c705abe2c9fddddd1d9c66ced

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