Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa2277abf2d73af…

MALICIOUS

PDF

85.3 KB Created: 2021-04-20 05:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c02784935e60fe3f720be037f70d12b2 SHA-1: e85b6a33e3bce40150cf5e09453d3efaa2794292 SHA-256: faa2277abf2d73af9c8bb794c6b8bc6c6ae1358b505537e9ee62fdd31e038b5d
186 Risk Score

Malware Insights

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

The PDF contains a link farm with 25 external links, many pointing to disposable hosting, suggesting a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=how+many+calories+in+food+australia PDF link annotation
    • https://cdn.sqhk.co/fovomesit/ehdicjj/vedeguvikuta.pdfIn PDF document text
    • https://lezevonunibo.weebly.com/uploads/1/3/4/5/134577944/2489d.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/hfgihdC/visaxidobitu.pdfIn PDF document text
    • https://zofitete.weebly.com/uploads/1/3/2/7/132740948/1d63662bb.pdfIn PDF document text
    • http://aazzzry.space/google_sheets_standard_deviation_if6sw06.pdfIn PDF document text
    • http://videohost.space/39332154558tbnyz.pdfIn PDF document text
    • http://xozonline.ru/binutazexirezedekireiy1du.pdfIn PDF document text
    • https://cdn.sqhk.co/tarolaser/WWjc1gd/bofajotijuviwuboribapi.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/gg0ibjh/51108287282.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/EgjGhhw/dope_hunter_x_hunter_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/Bgejajf/flying_motorbike_simulator_download.pdfIn PDF document text
    • http://islta.fun/88667609939nu24o.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/ZiihjfJ/gesorusetewexor.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • https://jumirugefof.weebly.com/uploads/1/3/3/9/133997886/1016335.pdfIn PDF document text
    • https://xolojafiwonizup.weebly.com/uploads/1/3/5/9/135966724/gidutotagejigibug.pdfIn PDF document text
    • https://cdn.sqhk.co/newupulig/gdgcQO4/ruvabejinimime.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xotepugiz.rf.gd/kaththi_movie_bgm.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_747640ac769a42839a5b4be26d265afa.pdf?index=trueIn PDF document text
    • http://fezolal.rf.gd/sifup.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_b3a18c90684848bb985cf4c64a8ceeff.pdf?index=trueIn PDF document text
    • http://futuwerelak.epizy.com/36992770326.pdfIn PDF document text
    • http://nowaginog.epizy.com/dusafinutolatitamurufunur.pdfIn PDF document text
    • http://rogofijanititad.epizy.com/kenmore_dryer_not_drying_well.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_65689ccffb9a4a238f054d8e189e88c8.pdf?index=trueIn 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_off00010f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F31 5324 bytes
SHA-256: 5f0a539478ec42daef8d9546c98a89d5c8dd8b7699e44300921b91529eb468c4
font_01_sfnt_off00012147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12147 11324 bytes
SHA-256: 1464a03994539c69684fcc1545dc515f1e7e0d7fca81755a00e435d59c320962