Malicious PDF — malware analysis report

Static analysis result for SHA-256 984b0738e95a6def…

MALICIOUS

PDF

77.1 KB Created: 2021-03-25 13:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 74ad6ebc90fd36edddfd38ca3d75524c SHA-1: d334a245112d702c819f90e57b7f26e41c55cbf2 SHA-256: 984b0738e95a6deff7c94d2f5c86844e404e84e3b5e57f36c4c976cabff3f34b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=how+do+you+become+a+fit+tester PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489732/normal_60221675a67fe.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/5fd095387f03.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/ib8hajd/sakib.pdfIn PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/1813893.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/21_cfr_part_113.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/forawi.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/ya_no_eres_pan_y_vino_letra_con_acordes0b90f.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/cthgfyb/bubble_witch_2_saga_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383807/normal_5fe39f12167fc.pdfIn PDF document text
    • http://creamwalls.online/graphic_novel_online_freenf31d.pdfIn PDF document text
    • https://wigowuwadapol.weebly.com/uploads/1/3/5/3/135315864/mufigiluv.pdfIn PDF document text
    • http://bestrongbyg.com/femolezowuranodix16et7.pdfIn PDF document text
    • http://gekiwejal.scienceontheweb.net/52743367198.pdfIn PDF document text
    • https://cdn.sqhk.co/tudakesovif/ihd1qs9/kazopaposuk.pdfIn PDF document text
    • http://smirnoff-optic.com/7199448299586xjz.pdfIn PDF document text
    • https://gigojajalul.weebly.com/uploads/1/3/4/3/134320096/balerixugofifapa.pdfIn PDF document text
    • https://nowebapimigofok.weebly.com/uploads/1/3/4/3/134338607/lupoluwawa.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/tikofaketonub/cv_europass_template_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/52546820656.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/chunk_up_the_deuce_instrumental.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/24902378882.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/buxulasupilopak.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_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 5432 bytes
SHA-256: f38e0fb3b5e8fe874f67a342d5312c11b7b8d85f78b8836650a6ccb0be2f396b
font_01_sfnt_off0001006a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 11388 bytes
SHA-256: 130c252be421b17384a9a2462b570b78b1ebaf710598ddf22d9de6c7ca82371b

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