Malicious PDF — malware analysis report

Static analysis result for SHA-256 582bd7227c05b573…

MALICIOUS

PDF

67.6 KB Created: 2021-03-28 17:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 705b512a5fe5fb1bf427a6dbfa0be889 SHA-1: f5506ffd4f129b65a11be5aac0711ef7fa70c7dd SHA-256: 582bd7227c05b573542570aae686bdd1199c2a37800ec0d49c854a8928fee0b8
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious websites. The presence of a URL with a 'utm_term' parameter suggests a phishing or scam attempt to lure users with specific search terms. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/123?utm_term=algebra+1+unit+3+test+review+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416331/normal_6049f120e1dcb.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/davikigoxolati.pdfIn PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/191fd2d5542b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_6040778f492b9.pdfIn PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/4930040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_5fd6230074fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_600c6e70219ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5fcae50a68fcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/46daa0f3-a758-4ee9-8fc8-42a8312a3ac4/the_penguin_anthology_of_twentieth-century_american_poetry_ebook.pdfIn PDF document text
    • http://pezatiwasab.epizy.com/ffxiv_drg_guide_5._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839c71ae-9e0c-451f-bc63-db661f40a609/cortisone_injection_pimple_before_after.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/27093799796.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/cidr_ka_full_form.pdfIn PDF document text
    • http://nalikala.epizy.com/surah_al_kahf_full_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dacefefa-c912-43b2-a58a-b45ebbe44498/nezixes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04ea0b8-e8eb-46a0-93da-4ed2ee5c1dc9/taparekanekalo.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/whats_a_phantom_pregnancy.pdfIn PDF document text
    • http://pibunowawoxi.epizy.com/how_to_fix_sheetrock_corner_cracks.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/2520910636.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/50999761821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe093cd4-f42c-4276-b674-8bf923553712/3d_home_design_apps_for_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9afdeb51-acf8-4f8f-bf61-465deb466585/fuvigidagufedusub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af759ec2-1957-4891-b2a4-8b05a736f5ec/29376211344.pdfIn PDF document text
    • http://pabaxonewopux.epizy.com/affirmative_negative_interrogative_sentences_exercises.pdfIn PDF document text
    • http://fuxazulofonu.epizy.com/burt_harding.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_off0000cc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC38 5352 bytes
SHA-256: 105d4779142c7cb2948eb9caf38514e080ecff3abfbf679fc76c986100509737
font_01_sfnt_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 9944 bytes
SHA-256: aa16d4071410e87112fe8a193375af6da8d809c18e7eac4339fa2ef911ac8106