Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7aa933488d6fd5…

MALICIOUS

PDF

71.7 KB Created: 2021-02-21 05:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 62e3930b473e324e2a1dd526cc93da95 SHA-1: 319697c12e23e3f03954a9a5dbdf6a0c21ce27ff SHA-256: ea7aa933488d6fd50eff40480f79e339b6f662c75969c362a106ed0e178eabc1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=noun+clause+exercises+with+answers+pdf PDF link annotation
    • http://salonop.xyz/3801977067988yic.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/78022feb0690.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/ac9fd0b.pdfIn PDF document text
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/xuwonafulida-guwodufulow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460233/normal_6026c9f9db269.pdfIn PDF document text
    • http://magnetfix.store/tugobaritir2y5y.pdfIn PDF document text
    • https://noriledefokotox.weebly.com/uploads/1/3/0/7/130739853/5bacf.pdfIn PDF document text
    • http://cmb-societe.com/bose_soundsport_headphones_androidfmk7f.pdfIn PDF document text
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/deporosawiro.pdfIn PDF document text
    • http://save50.pro/charlie_malayalam_movie_free_in_tamilrockers8dtu1.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/sajezife/anu_baby_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/classroom_rules_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/icloud_for_my_pc.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_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 5372 bytes
SHA-256: c219c056fbe087e136c75ec47fe2f2ebb08f576b22171177100f6d2374df6333
font_01_sfnt_off0000ee3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3C 10364 bytes
SHA-256: 25ebe872a627ab5da30913ba24e73a82768bd848f55adddbc2f0f1ca82d980fe