Malicious PDF — malware analysis report

Static analysis result for SHA-256 428ee80d21948e73…

MALICIOUS

PDF

75.1 KB Created: 2021-02-25 18:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a171f243306bb05b05b80eceda964389 SHA-1: 562f257d2268d948eb5fad33988e4807bb0577bd SHA-256: 428ee80d21948e733e5081997525a82b6b306e3c6f14ef2635e8e6595de3ae47
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous external links, many hosted on disposable domains and Weebly subdomains, indicates a link farm designed to redirect users to potentially malicious content. The primary URL, https://baarspo.ru/wix?keyword=pantone+formula+guide+solid+coated+download, suggests a lure related to downloading a file, likely a phishing or malware distribution attempt.

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 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://baarspo.ru/wix?keyword=pantone+formula+guide+solid+coated+download PDF link annotation
    • https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/fc2bd57ee55a.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/gcihBif/32910659214.pdfIn PDF document text
    • https://cdn.sqhk.co/govamopega/6gD9uxp/novakadibinojel.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/rodaxoselikaw.pdfIn PDF document text
    • http://lifeshop.pro/4266379888w1l4q.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/john_deere_mower_for_sale_australia.pdfIn PDF document text
    • https://zegabanibo.weebly.com/uploads/1/3/5/3/135339571/jetebo.pdfIn PDF document text
    • http://umkatrade.ru/kaxuwirofesejipa4egev.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/lg_4g_lte_hard_reset.pdfIn PDF document text
    • http://myyshooop224.site/bail_application_format_under_section_307ysem8.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/JCjihgJ/transparent_phone_screen_hd_apkpure.pdfIn PDF document text
    • https://garituba.weebly.com/uploads/1/3/4/3/134335889/cd00bf.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/Hlqhchc/english_premier_league_store_london.pdfIn PDF document text
    • http://artistichomesolutions.com/vatifexogumss10.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/3701609.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/rutufokedizon/chhattisgarhi_suva_geet.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/32434519871.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/46106626394.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_off0000dc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC05 5316 bytes
SHA-256: aec577e3e99e377ea7c52c9e03826cd0e7d825c20ea7afc25ca1d4dfde9f9863
font_01_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 10184 bytes
SHA-256: 56e67d59c862157a032fd2f8695c598f35cca959f49a9a4f66002a84eb044ea0
font_02_sfnt_off000110fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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