Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6516166e83e83a…

MALICIOUS

PDF

77.2 KB Created: 2021-02-02 11:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 26f8c76b939c72903416665a3eeba5b9 SHA-1: e9e9dccde0832f9af5cce7177d32b5d5455e80a4 SHA-256: eb6516166e83e83acb435a7479e08cddfe3003405e5be7a591cfe563802eae4c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to exploit vulnerabilities or redirect users to malicious sites, likely through embedded JavaScript or by leveraging PDF reader exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/aws?utm_term=audio+visualizer+after+effects+free PDF link annotation
    • https://jofevuwob.weebly.com/uploads/1/3/4/2/134235005/virurix.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/JKThcgj/43462950181.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/HQhbiih/menu_dan_harga_domino_pizza_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/yhjJ6ja/ritujutude.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/dhgc6sp/wukujixolafa.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/dK1ig1R/liverpool_fc_sky_sports_news_now.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/XRidchi/2020_fantasy_football_rankings_ppr_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/brWhaig/bearded_dragon_names_from_movies.pdfIn PDF document text
    • https://sanawovixib.weebly.com/uploads/1/3/4/6/134653903/4e5d2d6dd9fb93d.pdfIn PDF document text
    • https://likufugusatu.weebly.com/uploads/1/3/1/4/131406708/1196897.pdfIn PDF document text
    • https://witabavuwimob.weebly.com/uploads/1/3/4/3/134339013/latixig-mexasazogo.pdfIn PDF document text
    • https://xitirume.weebly.com/uploads/1/3/4/3/134392652/712c7d4.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/mamibis/59653113817.pdfIn PDF document text
    • http://teguxivufir.rf.gd/spirit_airlines_information_about_baggage.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/close_up_pics_2_answers_pack_5.pdfIn PDF document text
    • http://mutidulofof.epizy.com/dapulapapup.pdfIn PDF document text
    • http://mapulikilep.epizy.com/vejatigubanelo.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_off0000f263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF263 5112 bytes
SHA-256: 1fcd10835fdd0473a2b15087f2da352cbb55f5588e5a5969e655925cf8030c81
font_01_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 10396 bytes
SHA-256: 96e9d667f69245655372b1bbb36ee536d5dfe1706ec1594e465cc0916fea7c6d

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