Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ff3c7fb58ba1c4…

MALICIOUS

PDF

84.2 KB Created: 2021-03-19 18:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6f2eefb357d99256b9e2654af7c22c92 SHA-1: 88a674624f061e96adc28e726e74d588f786571f SHA-256: e8ff3c7fb58ba1c4be347bb3d7732cc58e4354b7fd7afad5999a061853971861
126 Risk Score

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 0.9950

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://seumenha.ru/aws?utm_term=grohe+ladylux+plus+pull-out+kitchen+faucet PDF link annotation
    • http://xuxetosufuzo.getenjoyment.net/whats_the_product_code_for_sims_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500670/normal_5fdd42126286e.pdfIn PDF document text
    • http://lazakefezives.mygamesonline.org/caida_libre_historia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_60228536638f2.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/32511671285.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/cxeoNia/shipwreck_island_raft.pdfIn PDF document text
    • http://detonic-deutschland.website/what_is_the_newest_ipod_nanox9anf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_60384461320ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417220/normal_5feb466f4822c.pdfIn PDF document text
    • http://rafupufubed.mypressonline.com/alcohol_and_phenol_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_60500ae379e96.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/jemuruxape.pdfIn PDF document text
    • http://1offpark.xyz/794754773528i3h3.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/bounded_rationality_in_decision_making.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/cBUigge/61511533380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_5fd799be591f8.pdfIn PDF document text
    • http://tuzevijubozor.mywebcommunity.org/21586175824.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/gdiePjC/halloween_party_invitation_template_word.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/fibokesuruliroretar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454430/normal_600122ef15ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459481/normal_60218a097923e.pdfIn PDF document text
    • http://dalnoboyi.xyz/asymptomatic_microscopic_hematuria_aua_guidelinespwksc.pdfIn PDF document text
    • http://drive4mclaneaustell.com/jukaluzosovededotutugonodz2vr.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/nasb_thompson_chain_reference_bible_large_print.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/IidsjN3/wolf_online_mod_apk_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_6014fbdc61526.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/bBvgdQq/gewawovewurewabarusopiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rogomore.myartsonline.com/6779734439.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 5424 bytes
SHA-256: 89ecfe5b07a13b0f4f03a47ac536ae72d81d99ed93fcf0f8b1c09b5e17f09027
font_01_sfnt_off000110df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DF 10648 bytes
SHA-256: 288b185daf4aaa8117174b4871faeda6327b94f5ca26e7b6a9bc320dd1eec4e3
font_02_sfnt_off00013486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13486 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71