Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d17160057c0767…

MALICIOUS

PDF

75.1 KB Created: 2021-05-20 21:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f45d60cc7c5fc8484d6c626521d6302f SHA-1: c27c155a2d8714395dd3073f559254c3935730f9 SHA-256: 77d17160057c0767de73add4ff5e01dbb14dfa0bf77c787c2a8a6c752e1cc5df
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm for SEO poisoning. One prominent URL, 'https://resalured.ru/strik?utm_term=how+to+fix+airbag+light+on+ford+explorer', is presented as a search result, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://resalured.ru/strik?utm_term=how+to+fix+airbag+light+on+ford+explorer PDF link annotation
    • https://bitoxogosem.weebly.com/uploads/1/3/4/3/134386372/875f99452b82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fcae5cac307d.pdfIn PDF document text
    • https://moxudoged.weebly.com/uploads/1/3/3/9/133999753/gafoxup-nomaroguvebugig-bonor.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/9804639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_601e18af8e350.pdfIn PDF document text
    • https://kozamenarolu.weebly.com/uploads/1/3/2/6/132682647/pelitaxegazovow.pdfIn PDF document text
    • https://lipuguxe.weebly.com/uploads/1/3/0/7/130738524/romapanemota.pdfIn PDF document text
    • https://popepinasi.weebly.com/uploads/1/3/4/8/134892117/lowino.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
    • https://s3.amazonaws.com/pogolo/flight_race_game.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/95367511236.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/4186830299.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/jurawenafijajilitubawatam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a32ec6-0a52-4a3a-baa6-444b813f1beb/boxunogupaxixidajixekol.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/voya_index_annuity_rate_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/blank_sheet_music_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/falileferil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c929a095-4d43-4070-8881-ca87a8994d83/trunk_control_test_tct.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/miwisodeximafimit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587005ba-5bef-4137-90c4-e3a2cdff851d/susavudebivepat.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_off0000dc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 5172 bytes
SHA-256: 9634283f6dbeef09827b039213ac786b907c6bf1da3ea9dca6ac825f7808516a
font_01_sfnt_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 10304 bytes
SHA-256: bbe7bfd1827220e581dba12915af9e3d528f161bebc8c06cab57448a3323cd43
font_02_sfnt_off0001111b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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