Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f4805c792413c6…

MALICIOUS

PDF

78.5 KB Created: 2021-03-17 16:35:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e5e08f535aeabe6a86488ec666815bc3 SHA-1: 76e46d78afdc7f5df3b89c3a9ca58faaff395367 SHA-256: 74f4805c792413c6fd74042a34d28bae20d04b3eb956aa2b59ccf0baa399f65b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=when+a+guy+says+i+really+like+you+alot PDF link annotation
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/7844249.pdfIn PDF document text
    • http://faguduni.22web.org/oh_baby_video_songs_telugu.pdfIn PDF document text
    • http://kellys.space/90153813649gn6uq.pdfIn PDF document text
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/vafoniziji_repuxunuluk_lotividupex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_603a054a8aff2.pdfIn PDF document text
    • http://fsfsfd.xyz/68476526600bcnh0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_60011013101a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_5ffce57cbba5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fd63c9835285.pdfIn PDF document text
    • http://beautysss.site/6688141779ob2kc.pdfIn PDF document text
    • http://new-leggins.site/expositor_s_bible_commentaryu526l.pdfIn PDF document text
    • https://livorenofog.weebly.com/uploads/1/3/1/1/131163774/nixulege-ketup.pdfIn PDF document text
    • http://stavki-na-sport.site/sparknotes_the_tempest_act_1_scene_2ojvi2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470038/normal_5fcb54269a522.pdfIn PDF document text
    • http://investmag.org/asus_p8z68-v_pro_gen3_manualth0aq.pdfIn PDF document text
    • http://fdvsefwfrw.space/kopuxebizabompalbx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tapejufujol.epizy.com/60015382300.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_445a069e10794986a62ea301ca779e0b.pdf?index=trueIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_2c9f38ad277e4f198fce3121dd977cbb.pdf?index=trueIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_40e4b775daa945949e19d688aa33e126.pdf?index=trueIn PDF document text
    • http://pinopog.rf.gd/66839400119.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_41eff69b3b60437e846a89b224176cb2.pdf?index=trueIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_229179836a1c43d6a48da5ab86168e2f.pdf?index=trueIn PDF document text
    • http://zatugawaxevi.rf.gd/98982993625.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 5008 bytes
SHA-256: 386983a267b732aff71a16d72b135177f9b93d3a5d4927f8d496971488294432
font_01_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 10476 bytes
SHA-256: 20d93e6409cd348fa9702d6dc95ff3ea074955ec2007ee6bfbf1d93596e629fd
font_02_sfnt_off00011e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E59 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2