Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdc47566e0ad912…

MALICIOUS

PDF

70.4 KB Created: 2021-03-04 17:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eec7139963a1e7db73b30061f53dabab SHA-1: 6259a0dc52fd0b4176208ce3932a224e5ac0df55 SHA-256: ebdc47566e0ad9126209b97818c19781072a9b2f5e5d605c183840526a6f2738
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One prominent URL, 'https://baarspo.ru/wix?keyword=practice+incomplete+and+codominance+worksheet', appears to be the primary lure. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=practice+incomplete+and+codominance+worksheet PDF link annotation
    • http://tuderoba.getenjoyment.net/seth_klarman_letter_to_investors_2020.pdfIn PDF document text
    • http://newyearshop.site/wd_my_cloud_ex2_ultra_2-bay_nas_8tb_testzjir2.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/xarasunagexaf_wugifujegu.pdfIn PDF document text
    • https://sasominafa.weebly.com/uploads/1/3/4/3/134362810/fivimonesolomose.pdfIn PDF document text
    • http://tufilevazoropiz.iblogger.org/artigos_biocombustiveis.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/rupaxipusob.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/8e5a63eaf.pdfIn PDF document text
    • http://serdyukov.pro/wulab3g4xx.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/dawezejopanugafobi.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/pikejumiveludisa.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/gipibipowefut-tovuwe.pdfIn PDF document text
    • https://xasizati.weebly.com/uploads/1/3/5/9/135978204/7454350.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/pemekafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dumumuvuxu.epizy.com/16571699816.pdfIn PDF document text
    • http://difugarulid.epizy.com/27221560982.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_bb876f4edf8e4f5394fb2f4a77165745.pdf?index=trueIn PDF document text
    • http://tidukalimipeba.epizy.com/76443054646.pdfIn PDF document text
    • http://tatefubuzu.rf.gd/61152394038.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_b09a637d88164161a87b221d92b7daa2.pdf?index=trueIn 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_off0000d810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD810 5468 bytes
SHA-256: 5e291ef583069cabd63a0d5f8a3fb4ab94fa61dd893f32cd01b5da30299c3cae
font_01_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 9888 bytes
SHA-256: b1f45534e9b4dfbb5ae890e682ef25b5422839c05105ad0337861648ec852334

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