Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93d865f3c973020…

MALICIOUS

PDF

82.3 KB Created: 2021-03-29 18:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1158596cda50a07fd1e3657166b325a3 SHA-1: 84444089811228808b055ddae2726203db10cbdb SHA-256: d93d865f3c9730206ae87523442a78781a385ca9c085b5a83fe03013d9e16ff7
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 0.9998

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://mezovuduw.ru/wix?keyword=capitulo+8a+answers+page+153 PDF link annotation
    • http://good-production20.site/zumupipovibipisorasebof5cy92.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/6101993.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/eDYur2L/sunikopizuf.pdfIn PDF document text
    • https://cdn.sqhk.co/bokupajokim/6ijbIOX/pimapadujedatol.pdfIn PDF document text
    • https://gexifimi.weebly.com/uploads/1/3/4/6/134672357/virugifegizebajoro.pdfIn PDF document text
    • http://kinorio5.xyz/the_analysis_of_biological_data_first_editionfm4hp.pdfIn PDF document text
    • https://sogutujugaj.weebly.com/uploads/1/3/4/4/134403955/8e5e1db133cf0.pdfIn PDF document text
    • http://businessoutsourcing.info/lanunilaxelojakidubinjn6ql.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/1167101.pdfIn PDF document text
    • http://zdsshop.top/asus_m2a-vm_socket_am2_motherboardscknw.pdfIn PDF document text
    • https://sezivokup.weebly.com/uploads/1/3/5/3/135318733/3ad4b.pdfIn PDF document text
    • http://lasleymarkt.ru/seidels_guide_to_physical_examinati9mkut.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/jivagajamav/76417319706.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/bollywood_movies_2017_mp4moviez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ab4a3b-d8a8-4719-91a3-0ea7b879ac92/wd_my_passport_ultra_format_for_mac_and_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d705c0-9e0b-4b89-82e2-92c771085f9c/83181720162.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/caballo_de_troya_9_completo_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/gimubemamitujelapidejuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b062dc-49fe-49ea-be5a-4891e67d2ebd/2166042011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b2a9df-65cf-496b-af21-40cc69f7f380/57631081916.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 5520 bytes
SHA-256: 9eb3c6e6bd9bc06cc4171f1e6e0f912f5e731e2f4e206b16794dea79933e44ec
font_01_sfnt_off000116bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BD 11392 bytes
SHA-256: 8f7a2921de84d1bc1e58075f11562dd7bf461a12841880a67dfcbf052ec3ec30

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