Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf77b186d676691…

MALICIOUS

PDF

63.6 KB Created: 2021-03-15 21:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8b2813c62ecd0ce0429653203e62aa1c SHA-1: d61f9a7a4ad418a4febee66557feac0b1b20cc33 SHA-256: dcf77b186d67669165289c42e09a6ab7823254491da750972f00648c753ad3d5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/123?utm_term=land+booking+application+form PDF link annotation
    • https://bifulegipemafus.weebly.com/uploads/1/3/5/3/135312859/pezabipetaf.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/16091135389.pdfIn PDF document text
    • http://pekibexuvipeve.scienceontheweb.net/jet_jj-6csx_parts.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/accord_en_francais.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/fexutuj.pdfIn PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/cd359f6772.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/cambridge_international_as_and_a_level_business.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5ffb59f847a63.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/samsung_scx-4623f_scanner_problem.pdfIn PDF document text
    • https://wopixidotawus.weebly.com/uploads/1/3/4/5/134506387/sunozazaxo.pdfIn PDF document text
    • https://sibanixo.weebly.com/uploads/1/3/1/3/131380297/4434025.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/gosodazivavik.pdfIn PDF document text
    • https://mogomanazeveka.weebly.com/uploads/1/3/0/9/130969503/5722326.pdfIn PDF document text
    • http://zagavexakagin.mypressonline.com/manual_biomagnetismo.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/lufitufojuwud.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/english_common_core_standards.pdfIn PDF document text
    • https://ramaxudefe.weebly.com/uploads/1/3/4/0/134042793/930423.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5ffcabd1600bc.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/zixen.pdfIn PDF document text
    • https://vakufijasulu.weebly.com/uploads/1/3/4/5/134592391/4fcb106b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekazaz.myartsonline.com/vitamin_b12.pdfIn PDF document text
    • http://kesolimasakifi.myartsonline.com/when_did_the_dyson_dc35_come_out.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/absorption_chillers_and_heat_pumps_second_edition.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_off0000c077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC077 5440 bytes
SHA-256: 1649270c7cc3b1dfb3a7f499a1c512d4c3bbce7d28e27a04bda842a846b42d7f
font_01_sfnt_off0000d2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2ED 8792 bytes
SHA-256: 3fc23d409438d3640aea5cb1d16882fb976139c486f615ee0b0d2aa2a0edf2fb