Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f06b6a6212cd50f…

MALICIOUS

PDF

76.0 KB Created: 2021-02-23 00:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 282351afc8e0aa1c9c816f2185663ffe SHA-1: 288a1b37dedc51ce4ece7a409ec39766c429a42d SHA-256: 7f06b6a6212cd50f7d88c23cdffdabdb3fe0b904c9970a1905f644585b55276b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://maypoin.ru/strik?utm_term=how+to+tie+leather+cord+jewelry', suggests a lure to a potentially malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent, likely related to phishing or SEO spam. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=how+to+tie+leather+cord+jewelry PDF link annotation
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/wifunulavavur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452152/normal_5fcae65759d4b.pdfIn PDF document text
    • http://smartycredit.info/lezuduxuwazawobokomukav385m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463808/normal_5fe53be4cf8ea.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/sudaxopenumome-xobivisegor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_602ae0c4deefb.pdfIn PDF document text
    • https://cdn.sqhk.co/wetiniwem/g3ig02x/vifitekexidiposubikipu.pdfIn PDF document text
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/e8fea7f76e7.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/6rihggF/halloween_costume_ideas_womens_uk.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/5013d9c75241cb.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/calvin_klein_female_underwear_size_guideyxtlh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_600d4b532900f.pdfIn PDF document text
    • http://tiktoktop.design/oneplus_3t_aggiornamento_android_p72bqz.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/IgcCkic/tosenevam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496585/normal_5fd12d659ebc5.pdfIn PDF document text
    • http://naturalgood.space/kaplan_sat_chemistrys4e13.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/baxegezivumi/25256756289.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/pofisudejonadotak.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/kowewubinibitibu.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/88256721766.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/tagasilesadufubugo.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_off0000e36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 5080 bytes
SHA-256: 725a9062c6355ee3968033370f969a42a37b0dfe49f9145a41522605ac51502d
font_01_sfnt_off0000f4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B8 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off0000fd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 10752 bytes
SHA-256: 82b98223a787e5037a74c9dad398175db6523727d8afd9095ce05c952dde62d3

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