Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a06b7d5dbc3fc76…

MALICIOUS

PDF

77.7 KB Created: 2021-05-29 23:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4e16d22973fa9b962962f5f29d7ef66c SHA-1: dadcc4daa9cec20ec69b160388f3e66d03d2f8df SHA-256: 5a06b7d5dbc3fc76222ed7e908d406791caa6e4516215e19bf50587a7a02f4aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, indicates potential for further malicious actions such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/strik?utm_term=how+long+fasting+blood+work PDF link annotation
    • https://pewoguliburutoj.weebly.com/uploads/1/3/4/2/134234653/fetiwifopumegimupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_602b9893de37a.pdfIn PDF document text
    • https://soxixafefude.weebly.com/uploads/1/3/4/4/134434462/52397ca3b2a700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_601531c7d027d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_601173a94d63d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_606cb819c60cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_60475dad59b53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_6026241882f7e.pdfIn PDF document text
    • https://tesokumerapaj.weebly.com/uploads/1/3/4/5/134522001/xigigizenofofov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_6014901ee333f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391903/normal_5fc9ac6b8d5bc.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/ebff5585-113e-49b5-9854-57e3c2a4c24c/rivovezabanopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9349af6d-2535-4b29-b627-e598f00c1099/baahubali_2_tamil_full_movie_download_to_utorrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d647289-8607-4d07-a6b8-5b83911364b6/53602023685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca53b86-1657-4fcf-ba12-dc9dcb4ffad5/lost_and_found_bluford_series_read_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ba6be0-c9fd-4ae7-96f6-08ac44453ff5/talk_to_me_in_korean_level_2_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd79033f-1a1e-4780-b0a1-9368f5fa0160/18564806209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5a4411-df44-4d51-9f60-e6d88fc930a7/how_to_study_for_a_chauffeurs_license_in_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ec66ce-92dd-4ee2-aa88-8c004639b13b/46884961667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aca4e71-8b0d-48f9-b34b-35d41b9271ba/pablo_neruda_poems_book_of_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e004bdd9-415b-49dd-b859-4b3b847f15dd/rhinoceros_5_tutorial_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d7fadb-8f84-43d3-bc42-d432835c8374/badumebugenuzonofap.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_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 5332 bytes
SHA-256: 0a296141c28556e5f557e23579500279f82de629847577ae38c0784a1cb5797a
font_01_sfnt_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 10320 bytes
SHA-256: 169d76e00e08bca121d23c095627b537388cecc7e4b1d3234e73865985fa0d4d

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