Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc54a3562f1b5a1…

MALICIOUS

PDF

77.1 KB Created: 2021-04-03 21:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9f3140722f5a9a3469d050734b15b8ce SHA-1: 1ddd5f3a3338188442072ab163bf49ef232f5216 SHA-256: 7cc54a3562f1b5a116a4c51c2f41c8079656b97c8917e0267f4e36780103759e
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 pointing to disposable domains, indicating a link farm or SEO spam tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=praise+and+worship+scriptures+in+the+bible+pdf PDF link annotation
    • https://zikepasut.weebly.com/uploads/1/3/4/1/134108801/zajuzovenedezuwodeda.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/rupuji.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/Hgehbia/new_tamil_album_songs_masstamilan.pdfIn PDF document text
    • http://redajavuwav.iblogger.org/30589711585.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/xuvipevuwumif.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/7f348e011bc516.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/ghidhf7/3624803521.pdfIn PDF document text
    • http://xibawipo.22web.org/tapesozuzonizil.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/i3SRRBW/93271565762.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/eb9675bf-2e68-458c-b016-a74f02e3551c/dufililuzafiwafuwaranul.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_89a0c76747e44d789a4f811410b212b2.pdf?index=trueIn PDF document text
    • http://rolozaj.epizy.com/life_you_life_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632ebc40-2db0-4e02-bd4d-e9c1b607d6fc/is_netgear_nighthawk_compatible_with_att.pdfIn PDF document text
    • http://luwawabegopit.rf.gd/7_canciones_populares_espaolas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc348f1f-6b24-47c0-b4f5-11e4657eafe1/2008_volvo_xc90_repair_costs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8eac57-70b1-4868-8ca2-4dbeb31482e6/77053105879.pdfIn PDF document text
    • https://f9cb7010-568c-45d0-b0a5-7bd630b60272.filesusr.com/ugd/b10ea2_d4d1664d6335479dbebb639e2c2d0183.pdf?index=trueIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_074ce7b39a744cb1aa9ea86d8be5dac6.pdf?index=trueIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_96550a81f49e4f5395f17540512ab9ad.pdf?index=trueIn PDF document text
    • http://binenasi.rf.gd/govavojofinubikuwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd188ac-60e3-4ea2-972e-64f725344778/social_contract_meaning_simple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d107518d-5f25-4c21-a01c-82ff213cf0ac/zugaxonimomeg.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_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 5476 bytes
SHA-256: c18337fdaaa44a5c10233fc9eece7c1776353911898934e852910e2f0c0f9215
font_01_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 10772 bytes
SHA-256: 7f36997492c5d260b78e5e35d638dbc5e0f2af57d928b210cdbd78c24795914b