Malicious PDF — malware analysis report

Static analysis result for SHA-256 da506d2972d2aa9b…

MALICIOUS

PDF

80.2 KB Created: 2021-03-03 11:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 99bffb37e5f50a4863225ad8d995ac5a SHA-1: ea42e69c01e434c7f89fbc809087e8a52f8764f2 SHA-256: da506d2972d2aa9b8fa2bc01df713ef1a04789f4132ea1cbbdc97b9caa21dc93
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one specifically pointing to a 'sears men's underwear catalog' keyword search on 'seumenha.ru'. Another heuristic identified a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, possibly related to phishing or scamming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/wb?keyword=sears%20men PDF link annotation
    • http://vsspb.ru/free_handwriting_analysis_testp39f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_5fe64aae9c007.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/32484105016.pdfIn PDF document text
    • https://sixojatem.weebly.com/uploads/1/3/4/6/134650300/8740215.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/how_to_calculate_inflation_adjusted_return_in_excel.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/42855336399.pdfIn PDF document text
    • http://lozhobelir.space/vilazajawidigadididawasep39331.pdfIn PDF document text
    • https://xasavogo.weebly.com/uploads/1/3/1/8/131856096/6727348.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374188/normal_5fce8ac6c556d.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/overeaters_anonymous_eating_plan_grey_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bajekixizosi.myartsonline.com/ikea_malm_storage_bed_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/amazon_prime_mod_apk_xda.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/50557660720.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/posujekutivoseso.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/scheme_of_work_template_art_and_design.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/ap_us_history_summer_homework_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE32 5324 bytes
SHA-256: ac05c1cb6223ff2305e9c96ec1a653fc5866f7fd3b75c89c892a0875aeef1a94
font_01_sfnt_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 10960 bytes
SHA-256: 0c50e6f627d96397aec9754568714f89fa555278d45a533d5f5083f5530345d5
font_02_sfnt_off000125a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A7 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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