Malicious PDF — malware analysis report

Static analysis result for SHA-256 9372a5aeae1b9c46…

MALICIOUS

PDF

74.6 KB Created: 2021-02-25 10:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: eeaeddb26e5576896df4ed72f9d5fcdc SHA-1: 096810f8fe80fdbc8bbddcbbfd0ba6f967526fdf SHA-256: 9372a5aeae1b9c46fa06c61708fa1520765e72c93fc81b29af92651ce8c43794
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of numerous external links points to an attempt to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+give+pills+through+a+peg+tube In PDF document text
    • https://gopopozemilin.weebly.com/uploads/1/3/0/8/130874381/nunuxupat.pdfIn PDF document text
    • https://lonamejekewow.weebly.com/uploads/1/3/5/3/135396766/e57d637fc.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/rimumewefijemebi.pdfIn PDF document text
    • https://gigazafopojub.weebly.com/uploads/1/3/4/0/134040382/kaxagu_xomufutarasipi.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/hbih02P/tomoloo_hoverboard_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolegu/ijijgjl/linear_function_equation_in_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/UzghihN/kleptocats_2_puzzle_pieces.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/Xichcgj/kobe_vs_lebron_game_winners.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/iajbRhf/16304019788.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/Kjdgejd/totakafokofodateserada.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/xukonakefules/chahat_all_songs_free.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_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 5336 bytes
SHA-256: 518af606de5fe244f6079477a9c5813865d58d1806ceed90d3881df0c5a0fdb5
font_01_sfnt_off0000faf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF0 10272 bytes
SHA-256: 1cb7cb863fa908af079056c0c0af1f4b15ec3ecc39e28bd37563e10afb8d8c6b

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