Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f36fcc1810e174…

MALICIOUS

PDF

92.4 KB Created: 2021-03-24 02:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d43cd3884a2b1a049d4c3354994b1039 SHA-1: 1e9e484962b1abeaf7e06587b221a062f9dfd2ff SHA-256: 42f36fcc1810e17427791db6b777e158d446ad143f46f315022812d96a68d650
186 Risk Score

Malware Insights

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

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 0.9994

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://botokaw.ru/wix?keyword=ruby+tuesday+near+me PDF link annotation
    • https://cdn.sqhk.co/xamubana/iieEhgU/4369281406.pdfIn PDF document text
    • https://fibimijisu.weebly.com/uploads/1/3/4/4/134461798/9644858.pdfIn PDF document text
    • https://binufigelivu.weebly.com/uploads/1/3/4/7/134775083/5233248.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/bisuv_maguxakexig_kofoki.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/7hjgiEV/kelefoxevapok.pdfIn PDF document text
    • https://cdn.sqhk.co/moxofudifafi/ejbiiYZ/cartoon_single_bed_sheets_online.pdfIn PDF document text
    • https://cdn.sqhk.co/sifomujotaxa/ahciaPK/ziteviger.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/hhdgiih/80645124685.pdfIn PDF document text
    • https://lanutitokoxoziv.weebly.com/uploads/1/3/4/0/134096970/xepavemipo_befafo_jexiwegan.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/geluzisuna.pdfIn PDF document text
    • https://vogopulopom.weebly.com/uploads/1/3/1/3/131398589/5333782.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/2gh9Fy7/adding_multiple_accounts_on_instagram.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/vuxoladuwele_riwugegizuka_lenimewot.pdfIn PDF document text
    • https://cdn.sqhk.co/melalisopapu/lTibjhi/coffin_dance_meme_cover_10_hours.pdfIn PDF document text
    • https://rojaduvesasesa.weebly.com/uploads/1/3/4/7/134751848/xasamumugetub-lazon-jozenugipopaji.pdfIn PDF document text
    • https://furevevesegino.weebly.com/uploads/1/3/4/6/134653878/worogitebobu.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/7d076c1c-6df1-43b9-8270-82e483583165/motorola_xpr_6550_distance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46141ec0-5f24-4ad2-bde9-4e6bfa2b9faf/xukebekamofas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3193bd-1b05-4016-9522-2b0acba8ab22/ms_project_2016_free_download_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07190e57-3c5b-4557-9b65-9cbfe5bb6396/transformer_design_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee80a14-f324-4418-8c7e-3c36ba03f8b6/mipeturuwasudovumuvum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321e7e20-43d5-46a0-9963-3accef97546b/pipe_fitters_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a7560e-af1b-4589-9cbb-bf35dbe04e5e/96812342896.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_off00012ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD2 5188 bytes
SHA-256: 52720650c2b4fb042799eb1c9777e513788bad44876d83edf612c594f32c9fb6
font_01_sfnt_off00013c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C67 12012 bytes
SHA-256: 918c4c76b9e46e601be3e6c4ac16c27cb8464959e1f7752bc71e065e05d39ec3