Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d21974a5632132…

MALICIOUS

PDF

76.7 KB Created: 2021-03-25 23:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 25d9816d67abc7c4550a220dc0b40ef3 SHA-1: b099de21fdcb8352752df24abb1b7260f668542a SHA-256: 11d21974a56321322988466d353e58d67fe462ec33c0e29f99305d9e1ddec279
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://resalured.ru/strik?utm_term=sketchup+extension+warehouse+2020 PDF link annotation
    • http://morj.space/characters_in_all_the_bright_places0b29k.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/398090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_6029df90650b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_603bec5bdf0e4.pdfIn PDF document text
    • http://cafe-cok.ru/how_much_is_an_old_typewriter_worthqtl0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_6059a171ceba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_6009f5191f267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_604d67fd671f6.pdfIn PDF document text
    • https://mafopovum.weebly.com/uploads/1/3/4/3/134322216/8a5fa.pdfIn PDF document text
    • https://zeposonuvijuz.weebly.com/uploads/1/3/4/7/134702940/9065945.pdfIn PDF document text
    • http://abreudesigns.com/tuwudekutemezado3awqo.pdfIn PDF document text
    • https://fufuwotasivixi.weebly.com/uploads/1/3/5/9/135966690/biguzaga.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/duzoxosutapizegiparubukip.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/dda288103b7.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/8b2ca1f6-b02e-4c64-8340-84987efb1c16/maritime_attorney_seattle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c3fa76-e0a6-4296-a181-7ac1dc79ec7c/mesimovagalonasorilam.pdfIn PDF document text
    • http://tamafomuna.epizy.com/south_african_birds_pictures_and_names.pdfIn PDF document text
    • http://nutogexutal.rf.gd/dinisozunijokogigegowajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4433310b-f6b8-476d-ac1a-d554569c4605/diary_of_a_wimpy_kid_book_2021.pdfIn PDF document text
    • http://jadukubilelib.myartsonline.com/15183318622.pdfIn PDF document text
    • http://kalumewuvo.rf.gd/napijakoroforuxameragoxe.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_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 5588 bytes
SHA-256: 16128f5884d8e0ba5979f7e3b871ca302e9eeba4f1bd2879345044656cf55d3d
font_01_sfnt_off000101ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 10452 bytes
SHA-256: 28560182a01551d9249f9fa403eba6fb660c91833b1514cbcf4950e3681f31a4

Open this report in the interactive analyzer, or submit your own file for analysis.