Malicious PDF — malware analysis report

Static analysis result for SHA-256 769482aa7595d66b…

MALICIOUS

PDF

78.4 KB Created: 2021-02-20 15:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7d9065c9a57a171df7fb4b2bc548d83d SHA-1: 29d9270bed0fb5eff11da9b833b44c76d0e6359a SHA-256: 769482aa7595d66b964aa277b2c115dcc0d50b55b8b26c18bc857bd26c2171e3
126 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm hosted on disposable domains, with a high ML score and ClamAV detection for phishing. The embedded URL, 'https://jottigo.ru/123?utm_term=how+to+prepare+a+foster+child+for+adoption', suggests a lure related to foster care adoption, likely leading to a malicious site. No scripts were extracted, but the PDF structure and external links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jottigo.ru/123?utm_term=how+to+prepare+a+foster+child+for+adoption PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fe64564e848b.pdfIn PDF document text
    • http://womenit.space/lolos1dhbe.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/QgcggmX/electric_shaver_prank_app.pdfIn PDF document text
    • https://gakokoxexoboj.weebly.com/uploads/1/3/0/7/130776672/1094813.pdfIn PDF document text
    • http://marinarus.space/vernier_caliper_practice_problems_with_answershrurq.pdfIn PDF document text
    • http://vaworudewu.iblogger.org/76711532011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_6029ac141e58c.pdfIn PDF document text
    • https://wadabugijiri.weebly.com/uploads/1/3/0/8/130873870/gixenegaputogubogux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fd3194c9b12f.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/tapupalegefuvovu.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/50d6e1a2dccf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/piduwowufejed.pdfIn PDF document text
    • http://vorawaforase.epizy.com/reactor_biologico_de_lodos_activados.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/taxegu.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/hp_officejet_4500_printer_troubleshooting.pdfIn PDF document text
    • http://jugorufu.epizy.com/40071470014.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_off0000f72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 5296 bytes
SHA-256: 09a37b8b87cbf45fc9964968b46194da3d9295eb8dcc87a73fee3d26b85bb99b
font_01_sfnt_off0001093c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093C 10184 bytes
SHA-256: 42246b7734b9bd1c5ac3ebde94f57f7b4ee89142f63f34684e371ab86ca0ff2a

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