Malicious PDF — malware analysis report

Static analysis result for SHA-256 a573ab2949cd3c9f…

MALICIOUS

PDF

75.3 KB Created: 2021-03-16 03:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: add7e9643b20d08fa211562632e3d693 SHA-1: 92ccf06528db707fe6f6bd36b95bd2bb38d42779 SHA-256: a573ab2949cd3c9fbcaaa5b1cce681312193ab8b4773edb64dfcf0aa01592ccb
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 0.9992

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://zajinet.ru/123?utm_term=audit+report+filing+date PDF link annotation
    • https://bovoladimuva.weebly.com/uploads/1/3/0/9/130970023/83f6d035.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/jfgcjaX/89537385256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454047/normal_604dcd74ac6ea.pdfIn PDF document text
    • https://gufobetatogeset.weebly.com/uploads/1/3/1/0/131069923/2410158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_6015e632e32d5.pdfIn PDF document text
    • https://dexajaxalujum.weebly.com/uploads/1/3/1/8/131857565/10d87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417827/normal_60053ec95ece1.pdfIn PDF document text
    • http://m-laskin.ru/how_do_i_connect_my_hp_photosmart_c4780_printer_to_wifinmv7p.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/1HWijje/tuvaj.pdfIn PDF document text
    • http://wersita.fun/formula_para_convertir_de_pulgadas_a_mmj59ej.pdfIn PDF document text
    • http://novonet.online/ruributafufudi2gxfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478968/normal_603af440f1179.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/7360204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5ff12e7b68cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_604e378157a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489586/normal_5fe6a2dbb3f3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450890/normal_6007633632ce0.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/hgdiijj/laser_tag_tulsa_ok.pdfIn PDF document text
    • http://martakkord.ru/nobapigomufo83asu.pdfIn PDF document text
    • https://vusokozederik.weebly.com/uploads/1/3/4/9/134901716/gimofazixazo_piriwerowonu.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/49e82d06-5134-488b-a8b4-3b85c5d7cfb2/starbucks_tall_handcrafted_beverage_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c69dee5-1ab9-40f4-a3b5-abed9b4c3358/james_patterson_new_book_august_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba98cfd-5f36-4833-ae62-f94bec98fe0f/preposition_test_7th_grade.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_off0000eb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6F 5020 bytes
SHA-256: ae8d45846b418ffeed1d8360bc0e817e0f9212be8bdade090e182351a8272578
font_01_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 10272 bytes
SHA-256: b8888ea01c970ea830cfc34c9b41f0d3836eb00b456b9aa8a22cd42a2729be8b

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