Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb23ad6d589e2ec…

MALICIOUS

PDF

74.4 KB Created: 2021-03-16 18:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7897303f0a3274381f748100da43792c SHA-1: b3beecd6a90d940d85b7af9fa98cfec83fc81e98 SHA-256: 4eb23ad6d589e2ec4320d69d2c66121dd3042ad68a573182eda90f5adcf9ee94
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous embedded URLs pointing to disposable hosting and potentially malicious domains, suggesting it is used to redirect users to phishing or malware distribution sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure the true malicious intent by using a large number of links on disposable domains.

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://mezovuduw.ru/wix?keyword=how+do+you+calculate+total+selling+and+administrative+expenses PDF link annotation
    • https://lazetulomobepi.weebly.com/uploads/1/3/4/3/134326787/tuviluke.pdfIn PDF document text
    • http://knitfqph.site/891488880565caps.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/fhegcFs/wolinakosokava.pdfIn PDF document text
    • http://trydouche.xyz/260907696069dks.pdfIn PDF document text
    • http://trynon.xyz/qcy_t1_reviewljy4i.pdfIn PDF document text
    • http://foodguideblog.com/675615979686y5yt.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/3156433.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/wggehcr/83693020986.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/IhcjizV/tukuzubigat.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/TBZidZt/lelikoma.pdfIn PDF document text
    • https://jodejivosarixu.weebly.com/uploads/1/3/4/3/134314211/gezijagajuruj.pdfIn PDF document text
    • http://khareedforosh.com/besinebasiic8i3.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/jbjb6ge/history_channel_alone_gear_list.pdfIn PDF document text
    • http://yesitalia.fun/fifth_edition_character_sheet_hacked_apkifff7.pdfIn PDF document text
    • https://jibowosiz.weebly.com/uploads/1/3/4/6/134632869/mujov-zojefuvesegul-zusumusux-tuparetav.pdfIn PDF document text
    • https://zajodufukotu.weebly.com/uploads/1/3/1/8/131857357/muwijur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e2ea3f-04e5-473e-9f82-9f3b42f9413b/the_most_liked_song_of_all_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72655e3-60be-4e00-8597-e8bcb2ee3233/ratikujez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56639c07-458e-4b0b-8514-823994806616/how_to_implement_oops_concept_in_java.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 5676 bytes
SHA-256: fccbd5dc81c8932f832f7f07eb2019a9090e6a819b1a1137221107ad4ed468a4
font_01_sfnt_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 11452 bytes
SHA-256: c1a336e9e2d5312d3a3822bf1b8114fe1e4a0eeb9489d9d001570dc739bf26ef

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