Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3c93f59af88e14…

MALICIOUS

PDF

84.6 KB Created: 2021-03-09 04:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9452cf1524c79af05a8af0d6ad892353 SHA-1: dcf04d1248050c166812b399e9a4d2cec526a1cc SHA-256: 2a3c93f59af88e14808bc5f0bfa4c399f6c1f1b289d3821a507edfd1772f54e0
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 0.9961

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://gimoguvi.ru/strik?utm_term=directed+reading+section+energy+flow+in+ecosystems+answer+key PDF link annotation
    • https://fudolimag.weebly.com/uploads/1/3/4/5/134586879/1783475.pdfIn PDF document text
    • https://damosekim.weebly.com/uploads/1/3/4/2/134235752/cb821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481518/normal_5fe62548a9988.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/illinois_reg-1_form_instructions.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/51118604777.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/geometria_trigonometria_y_geometria_analitica_conamat_descargar.pdfIn PDF document text
    • http://jsexj.fun/developmental_biology_gilbert_11th_editionzr783.pdfIn PDF document text
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/c8b12f1ecc94.pdfIn PDF document text
    • http://detonic-official.website/xojurunonleoo.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/lojudug-wukag.pdfIn PDF document text
    • https://forakisoja.weebly.com/uploads/1/3/2/7/132740641/xijizunuvodidisalope.pdfIn PDF document text
    • http://shishkin-seed.xyz/987318995077seus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_602fa8756c7ea.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/31166917040.pdfIn PDF document text
    • http://drovazvenigorod.ru/7052598708a6mx5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404959/normal_5fcf9a006586d.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/vusojiburobile.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/duraflame_infrared_stove_heater_with_remote_control.pdfIn PDF document text
    • http://russianstravel.ru/864482027619vp1c.pdfIn PDF document text
    • http://toluvubub.mygamesonline.org/how_to_train_your_dragon_mcdonalds_toys_2010.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/5d87fc82-62d8-423f-a208-f037589a724a/diccionario_espaol_larousse_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fc589c-897b-4d33-a1a3-00626a0d2e17/26178163674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc289e1a-5b85-45c7-9858-e5083f672f4b/banarujewijikoluziworonaf.pdfIn PDF document text
    • http://mikijanux.atwebpages.com/rosevasuvutol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a085614-d8d8-4be2-9a77-6fa28a44aa07/what_spreader_setting_for_lime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922c6b51-3a84-4be8-842c-8a1cff600a29/the_missing_season_1_episode_3_review.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_off00010a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 5600 bytes
SHA-256: 162c7bfd6d2836de2cdad91ce063e78e0d786bfce0f4065d78494e1a9d2bf2a9
font_01_sfnt_off00011d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D79 11384 bytes
SHA-256: be357e4424025d096cd2fd6d9b725fabacfe2df5d824e30e2b8e395b2cba114a