Malicious PDF — malware analysis report

Static analysis result for SHA-256 82112321a5522b78…

MALICIOUS

PDF

92.0 KB Created: 2021-02-09 04:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7cb7ac5d8aa1f77ac5a3cf814220ae43 SHA-1: 07a65c42824c5d6c376c7170d9d232a10c7d82a8 SHA-256: 82112321a5522b78ea78b21ad2212b5dcf0bb0e84bfe8c426a31f6ff5a87dc1e
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://crophysi.ru/wb?keyword=1000%20thread%20count%20cotton%20percale%20sheets In PDF document text
    • http://instapriz365.online/conventional_agriculture_definitionp0k37.pdfIn PDF document text
    • https://remoruputudedux.weebly.com/uploads/1/3/4/0/134017090/silotore.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/fire_alarm_certificate_template.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/aYihjaI/nabajajisuxowalavozir.pdfIn PDF document text
    • http://gallery-shop.site/coaching_questions_a_coach_s_guideq5crz.pdfIn PDF document text
    • http://uscreditcheck.info/vabalebejulapodofaludwhgf.pdfIn PDF document text
    • http://fartook.online/17205147274mi3v7.pdfIn PDF document text
    • http://new-leggins.site/37186852357dld9p.pdfIn PDF document text
    • http://naturfresh.space/84568553489caqrv.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/hdG59hc/14857505784.pdfIn PDF document text
    • http://prodson.fun/40232931496063re.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/resixexi/70686060599.pdfIn PDF document text
    • http://wubavon.epizy.com/xawesam.pdfIn PDF document text
    • http://lanikudawojag.rf.gd/88470034783.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/14719799218.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_off00012bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB8 5260 bytes
SHA-256: 4364ecde63c6b2cb6bda2bc4bf47d9c960a071bc578be2593ef53b35d28230b1
font_01_sfnt_off00013d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D91 11256 bytes
SHA-256: 86b3ec2b1da43fa65eceb39e3c2faf1d40e030981fb2dd249a6938225ad6cfcd