Malicious PDF — malware analysis report

Static analysis result for SHA-256 1834a0c36ed1455c…

MALICIOUS

PDF

78.8 KB Created: 2021-01-20 08:22:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 0d471fb5809ed068a33a1aa65b14fc56 SHA-1: bdb093dbc818bf88896ba3024326bd3db378c252 SHA-256: 1834a0c36ed1455c361279c7e2f17d31d6bda88cf9f515d80f8f64e5d368829e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/nujivuzurom-bifewaxase-gopab.pdf.
  • 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/shook?utm_term=dexball+classic+brick+breaker+game+with+ball In PDF document text
    • https://cdn.sqhk.co/fosulavale/hbM8DIw/35523641943.pdfIn PDF document text
    • https://site-1257493.mozfiles.com/files/1257493/sentencing_guidelines_assault_gbh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492573/normal_6000595d59923.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/nujivuzurom-bifewaxase-gopab.pdfIn PDF document text
    • https://komidozikozapuf.weebly.com/uploads/1/3/1/4/131455883/fec379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_5faec28430825.pdfIn PDF document text
    • https://buwuxebukiz.weebly.com/uploads/1/3/1/6/131606134/xepexadakuxatageje.pdfIn PDF document text
    • https://site-1168264.mozfiles.com/files/1168264/fun_things_to_do_in_philadelphia_around_christmas.pdfIn PDF document text
    • https://site-1178226.mozfiles.com/files/1178226/55454091151.pdfIn PDF document text
    • https://site-1180945.mozfiles.com/files/1180945/likesozubasadereji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f94e00925d9b.pdfIn PDF document text
    • https://site-1173509.mozfiles.com/files/1173509/476202926.pdfIn PDF document text
    • https://site-1200115.mozfiles.com/files/1200115/99402279968.pdfIn PDF document text
    • https://ximepovefuvaxoj.weebly.com/uploads/1/3/1/8/131856443/jusokijoliduw.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/gh7iijb/angelo_s_soccer_corner_harrisburg_pa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/rs3_combat_training_guide_p2p.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/iti_delhi_admission_2019_date_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/duzufub.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_off0000f79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 5576 bytes
SHA-256: f45a417f41ad629abbdc7956fc9c0a0bc8f16be34a3a73ca209587479d6637fb
font_01_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 10324 bytes
SHA-256: f2034e3cad18cfe5faa6cb2c4b3521b9537045ea6b908a7a11f43979f73a6059