Malicious PDF — malware analysis report

Static analysis result for SHA-256 111a89594bf82bb5…

MALICIOUS

PDF

73.0 KB Created: 2021-02-24 01:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 25a811b85fb7e659037b4b8ff525076e SHA-1: c083a2412f28de26c347680f434c43217d6e4b93 SHA-256: 111a89594bf82bb5971d5f5b23a0720e1a78bfe91906e221c9f55778942d6fe5
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is https://baarspo.ru/strik?utm_term=abu+garcia+black+max+rod+and+reel, which is likely used to redirect users to malicious content. No scripts were extracted from this sample, but the PDF structure itself is designed to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/strik?utm_term=abu+garcia+black+max+rod+and+reel PDF link annotation
    • http://piredvizhnik.com/renasijikapanibetelapep6ci5.pdfIn PDF document text
    • https://cdn.sqhk.co/varipivokil/Sw1OFTW/43355729422.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/8xjcjbk/jususopusomopalomuxuxifi.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/eAAYGhc/dawn_of_empire_sam_barone.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/jaEPreD/sinutilejofodokoge.pdfIn PDF document text
    • http://cleaner-inn.club/junipurobodiwamut49qv4.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/jaQjejG/cake_games_unblocked.pdfIn PDF document text
    • https://xowonijateroz.weebly.com/uploads/1/3/1/3/131380337/7824887.pdfIn PDF document text
    • http://moviesaddaa.online/thin_layer_chromatography_questions_and_answersew19j.pdfIn PDF document text
    • http://qrastenmap.online/xedivenume1vmzf.pdfIn PDF document text
    • http://stebsmeh.space/beguvefejobanuloyro4s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rininimesoxino.rf.gd/pioneer_vsx_1020_remote_app.pdfIn PDF document text
    • http://wurozuvejesubot.epizy.com/mudufixozaduwolaxap.pdfIn PDF document text
    • http://fuzimobikuxuta.epizy.com/66265140817.pdfIn PDF document text
    • http://dulubuli.rf.gd/38993205046.pdfIn PDF document text
    • http://bixiremilipe.epizy.com/bang_bang_2014_full_movie_free.pdfIn PDF document text
    • http://posesesu.epizy.com/how_to_replace_battery_in_american_standard_thermostat.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 5344 bytes
SHA-256: 0613e1350336f144af84f919757b8806e5b9073724a92d3393a4224d1c72a0ff
font_01_sfnt_off0000ed3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 12080 bytes
SHA-256: e0c00fc6dc6e0dd6866303b081e319d80f0645e96cde5077c2fb3b0121ec119d

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