Malicious PDF — malware analysis report

Static analysis result for SHA-256 f884bbae3820ac36…

MALICIOUS

PDF

74.8 KB Created: 2021-03-21 08:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cb5e3135c75dfdd6282190c2e6efe3ca SHA-1: 55c998fe67d3d956f5f7ff4527a7f3c431d04694 SHA-256: f884bbae3820ac36708baab195a19d5391952c8dab4ab5c94d1e35d39d29fe7d
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

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://ponafet.ru/strik?utm_term=st+louis+de+montfort+church+oak+lawn+il PDF link annotation
    • https://gebifafotuzuwi.weebly.com/uploads/1/3/5/3/135324040/wufajezukokoxe_forog_galomovakusu_jepagaranugu.pdfIn PDF document text
    • https://vafunaparixidi.weebly.com/uploads/1/3/4/6/134627598/ef7d73698f69135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_60305b37d7dc0.pdfIn PDF document text
    • http://soxezujep.iblogger.org/nesitovavaditekedavin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392193/normal_5fcd1338c46ee.pdfIn PDF document text
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/b65a6efa8ff0ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_602a83be24fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_605686ea9eb33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488556/normal_5fff98770dd80.pdfIn PDF document text
    • https://luxufaxunixepu.weebly.com/uploads/1/3/4/5/134584211/03088258.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/57b873aea1f.pdfIn PDF document text
    • https://rikovikoxeko.weebly.com/uploads/1/3/2/7/132740842/fccd01734e9.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/3814044.pdfIn PDF document text
    • https://rorusipisaj.weebly.com/uploads/1/3/4/4/134496518/tixubavatuzit-netomifudakopef-jaguxofove.pdfIn PDF document text
    • https://boxenujevodaziw.weebly.com/uploads/1/3/1/0/131070305/9528823.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e730ba74-992b-4a2f-9e0c-e86b29b6d02e/buropirakasuzubivev.pdfIn PDF document text
    • http://didopip.epizy.com/84002594336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec336756-dc14-41e1-a98c-46303cf29ab2/radio_shack_weather_radio_12-251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec7dc82-a5b4-46a7-a044-f6bb379f7739/37787454110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e98e06-6b47-4222-8290-7104a0559c71/bionaire_ultrasonic_humidifier_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f292282-6e45-4ee8-97c3-e76680c3f3bd/wufinemezubejuvirinij.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_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 5520 bytes
SHA-256: d6c300e52e450a4302ce92c92ffbf9844e385c2fbfe9aa491803127642a21f01
font_01_sfnt_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 10616 bytes
SHA-256: ddd46f425f26f692da1695a32f8c728093e4d9f21ba8f39abb6a5ab7566c9dde