Malicious PDF — malware analysis report

Static analysis result for SHA-256 abda0dcb4f3df5f8…

MALICIOUS

PDF

73.0 KB Created: 2021-05-12 23:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6dd204c15c5c452d46a29dad17ed2aea SHA-1: 10bd4dddc6d869a345ca88047bdcdcf62b381f95 SHA-256: abda0dcb4f3df5f8b86b6c6b7d31b1b4bfae8d1e12489f54a84ae6c6e781ab2e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

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://mezovuduw.ru/strik?utm_term=what+is+lather+and+nothing+else+about PDF link annotation
    • https://cdn.sqhk.co/jujejorule/cYfgd1V/athlete_training_facilities_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_6015c63192be0.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/4245923.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/nobobu.pdfIn PDF document text
    • https://xakowuval.weebly.com/uploads/1/3/5/3/135316831/4854751.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/239423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422371/normal_605418c5cefc5.pdfIn PDF document text
    • https://kagopibuxewiki.weebly.com/uploads/1/3/1/3/131398156/mejowejelova.pdfIn PDF document text
    • https://damujulul.weebly.com/uploads/1/3/5/3/135335913/4669412.pdfIn PDF document text
    • https://bakijowo.weebly.com/uploads/1/3/4/7/134726649/2c78244aae917e.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/nijapid_gaburomajuxoj_pibedi_nepibefel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fe84dfacbcc2.pdfIn PDF document text
    • http://dunizajo.66ghz.com/79144855397.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/kKiggiH/rdr2_homestead_stash_sean.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keverulur.rf.gd/clasificacion_de_bosniak_2020.pdfIn PDF document text
    • http://vevurikadi.epizy.com/91698310944.pdfIn PDF document text
    • http://kelujisulajow.rf.gd/10521104961.pdfIn PDF document text
    • http://sinejelubomidi.epizy.com/hampton_bay_ceiling_fan_with_remote_and_light.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_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 5240 bytes
SHA-256: 5b1527a69e79458a43059dc38ee4087e67f435a773f93da06af05d97895732f7
font_01_sfnt_off0000f26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 10616 bytes
SHA-256: fa723c1ee232870d67bdb702fb429d61d946091df13c33b34c3ed49a61fb62cc

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