Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7f0beb5a688a5c…

MALICIOUS

PDF

76.7 KB Created: 2021-04-12 16:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ba3d6965cf4cc388d4367b91e703e58 SHA-1: 9fd62095534605095d3f4ed071bd62fd0367b500 SHA-256: 7d7f0beb5a688a5c6d1a0705ce2b7be2f54e5280c4409763b552e4713f470cd7
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 0.9960

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/strik?utm_term=does+my+cat+have+aspergers PDF link annotation
    • https://vevavosabiwebe.weebly.com/uploads/1/3/4/3/134349804/vorin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502920/normal_6067607594a9e.pdfIn PDF document text
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/2344ae765240.pdfIn PDF document text
    • https://dopakegufa.weebly.com/uploads/1/3/1/3/131384718/gumeni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_605398870df94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5fd0e677a50d1.pdfIn PDF document text
    • https://xikanunifozale.weebly.com/uploads/1/3/1/8/131860479/rukofidakomes.pdfIn PDF document text
    • https://gomosonu.weebly.com/uploads/1/3/2/7/132712120/potonu-nufofagitobeg-kukutedikefepi.pdfIn PDF document text
    • https://wakavofidokevi.weebly.com/uploads/1/3/2/6/132681750/5795973.pdfIn PDF document text
    • https://kawowubizi.weebly.com/uploads/1/3/4/8/134864460/8078644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_605ff05eede67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_6051262e87a30.pdfIn PDF document text
    • https://zitofizifejiza.weebly.com/uploads/1/3/4/7/134706741/2d4d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tarisuwagawata.epizy.com/57620211425.pdfIn PDF document text
    • http://vezavajizuvos.epizy.com/47122914231.pdfIn PDF document text
    • http://bexisojulodu.epizy.com/descriptive_research_definition_by_authors_2020.pdfIn PDF document text
    • http://viledif.epizy.com/78396558642.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/casper_im_ascheregen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd008c5-4fe9-4fcd-84fe-0ae78ae473ab/9415774077.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/9065595645.pdfIn PDF document text
    • http://dosunadis.epizy.com/tudor_primary_school_hemel_hempstead_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/83428945136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ddc3f2-cb6f-4d92-926c-b862645978d6/what_does_a_network_security_specialist_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893c7be1-481d-4f5d-8b4e-656f7513babb/nelimexajezijabibudewojol.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/places_to_donate_childrens_clothes_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99da2719-0905-45f6-b7ba-02b999f2ddb9/73053152705.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_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 5476 bytes
SHA-256: 56813c0a9c5fd10e47c7ce70fdf84678fe329b5883376a4a1bf15a000d56b496
font_01_sfnt_off000102c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C1 10188 bytes
SHA-256: 7c15f399f4c4984bba14ff551dfb2c9880c574c4f0e7cd78daff82940792b0ad

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