Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b06011ba31bbea8…

MALICIOUS

PDF

67.2 KB Created: 2021-03-09 03:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8d7dbc887f2a706d8efdea70345504a6 SHA-1: 16d836351011fb1b5e529c1cce5a35fb88e9e1f0 SHA-256: 9b06011ba31bbea822345285e62a593f7bf5cc25cf3b50d766039d9eb0656cec
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=fisico+quimica+atkins+pdf+portugues In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_601d14d722491.pdfIn PDF document text
    • http://purpless.vip/crm_vendor_evaluation_matrix_templatevw9ri.pdfIn PDF document text
    • http://afracheat9.xyz/black_and_decker_hedge_trimmer_replacement_partshvmto.pdfIn PDF document text
    • http://deflecfcvy.best/printable_taboo_game_cardsne6gh.pdfIn PDF document text
    • http://avlto.best/65743796061qmis7.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/differential_equations_and_linear_algebra_2nd_edition_slader.pdfIn PDF document text
    • http://idealicaitalia.website/49433239441apn01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_600cc24bd299c.pdfIn PDF document text
    • http://vittorguxx.site/diagramme_de_mollier_eaug3evp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_601978d4a9057.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/lg_lp0815wnr_exhaust_hose.pdfIn PDF document text
    • http://smartcreditscore.info/80252265122bg5e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426682/normal_60326649ee25f.pdfIn PDF document text
    • http://profer-opt.ru/61002953947t5au2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redebalumu.rf.gd/dell_precision_t5500_ram.pdfIn PDF document text
    • http://gezexibubaju.rf.gd/kivodoseriresumazu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/kindergarten_color_worksheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/62686776494.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/dish_network_bill_pay_login.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_off0000cae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE2 5588 bytes
SHA-256: e2aabe835f6da883160a0cd3ea54aafc4e420e368b04765604dfdffa0413a7f1
font_01_sfnt_off0000ddd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD1 9892 bytes
SHA-256: 2411b4f74df892f3babcbea2355ba78b66d64e0d583c043dc4eed643b0200b37