Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d6cf516209aba9…

MALICIOUS

PDF

75.7 KB Created: 2021-03-17 16:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4c5b869d2cdfe6ee9895abc97a3c4ef0 SHA-1: d587a8c6523d2115d9cdfcf993b04d62bd24acff SHA-256: 79d6cf516209aba947a5eb773315a8121bd322b07995e74f3b4168e9ddc91456
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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://golowaki.ru/123?utm_term=puzzle+template+transparent PDF link annotation
    • https://jikurufor.weebly.com/uploads/1/3/4/6/134613562/jutufezetewodine.pdfIn PDF document text
    • http://lojasamericanasbr.com/descargar_turbo_dismount_para_pc24uew.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/ijo4jgK/70139116283.pdfIn PDF document text
    • https://wejumarokurefa.weebly.com/uploads/1/3/0/7/130776247/fisirisuf_pegetidivipag_zipup.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/jef7Ejf/votojafifobolajulagaso.pdfIn PDF document text
    • http://hookup153.site/bitipifoxus1urp5.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/2jachaa/57597151588.pdfIn PDF document text
    • http://waystep.site/58180612738v3b00.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/2ighfic/71185694110.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/1210551.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/hfLhghf/70745772087.pdfIn PDF document text
    • http://tubezadobuzaro.66ghz.com/67162749664.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/pwja2jc/30155324970.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/loneminovu/bupupasazamenorotajom.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/bose_wireless_headphones_user_manual.pdfIn PDF document text
    • http://bexopikirekide.rf.gd/gadenetomivuv.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/fikabogituzi.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/29023432848.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/mt_everest_guide_service.pdfIn PDF document text
    • http://kulisiwodomewa.epizy.com/99421392351.pdfIn PDF document text
    • http://sajonagot.rf.gd/6923133819.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_off0000ee3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3C 5016 bytes
SHA-256: 1642a673364d82f65031955f51f6aa9fd5b6644a313bb69f5371f38933c33d8c
font_01_sfnt_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 10048 bytes
SHA-256: 9038c540f78186976bee7de5caae329c6a024d579a8f22d8ddb01a9e42d5067a

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