Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc5c7889ffefe0b…

MALICIOUS

PDF

66.6 KB Created: 2021-03-12 16:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ea207d897c2e771b7f982b312f863dcd SHA-1: 70bf19721ee4a9627f15796da523b61997403191 SHA-256: 4dc5c7889ffefe0b20737f1a8e81b6952ba0effed7d56c2f5231b199682a31af
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/123?utm_term=i+love+you+cartoon+images PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452588/normal_6035caa0f01e8.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/hjhh6nI/32825067761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_604a3b89a5610.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/elder_scrolls_v_skyrim_special_edition_prima_collectors_guide.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/how_much_is_a_transmission_for_a_2004_honda_accord.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/99008361167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414847/normal_5fedb20a943e0.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/gecjXih/58692054986.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/wadobixibulajijevozit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5fe29569f2057.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/6adf0ff0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493881/normal_60053c50773e3.pdfIn PDF document text
    • https://fixoxotogixas.weebly.com/uploads/1/3/4/3/134374926/7154181.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/how_to_become_medical_laboratory_scientist_in_australia.pdfIn PDF document text
    • http://memisada.mygamesonline.org/do_bose_quietcomfort_35_have_a_microphone.pdfIn PDF document text
    • https://vibisorimujeke.weebly.com/uploads/1/3/4/3/134344086/8cb0a.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/53955697-da27-40a1-9c93-0914515a4343/63466639302.pdfIn PDF document text
    • http://juvusowupu.onlinewebshop.net/66504996031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b798c9b-4df2-4257-a200-e73d82c5ace7/10628856798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0461fd59-1100-48bc-8276-f96a5dad588a/harry_potter_book_box_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376a6e51-5d13-4ad9-a3bc-d78c2fe4638d/tipos_de_comunicacion_no_verbal_iconica.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_off0000c810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC810 5216 bytes
SHA-256: d1905498ad65daf4292e1882851906f67205335e0b9a6aad52902b506ff6ea0c
font_01_sfnt_off0000d9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 10204 bytes
SHA-256: 560f71ac01c8f01e58e410b03fdbff1207f8ecb34dadb2e8c2ef0695a51543d6

Open this report in the interactive analyzer, or submit your own file for analysis.