Malicious PDF — malware analysis report

Static analysis result for SHA-256 469457329058e63a…

MALICIOUS

PDF

66.6 KB Created: 2021-03-03 19:08:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0e4057c5a4e9cbc9979ff43d23a3a55b SHA-1: d1bc1702071ba1f0b9926b6b3468d82822ede856 SHA-256: 469457329058e63ad707de7eba8b87d7cfb29f3afc84771984ddcf08b8a35225
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm suggest it's used to distribute phishing lures or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=lee%2527s+pizza+superior+wi PDF link annotation
    • http://newuwedeza.mypressonline.com/does_michael_from_the_blind_side_still_play_football.pdfIn PDF document text
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/xolomajadimale.pdfIn PDF document text
    • http://fanitukasi.22web.org/best_app_to_read_books_android.pdfIn PDF document text
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/1682285.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/hp_pavilion_27_qd_driver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_601b930646143.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/vosimalume/e_filing_lhdn_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/70120349494.pdfIn PDF document text
    • http://doroxokile.epizy.com/template_string_literal_js.pdfIn PDF document text
    • http://luxepiluwi.epizy.com/judevanag.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/cheat_pou_mod_apk_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/informix_4gl_sample_code.pdfIn PDF document text
    • http://wozaxanakix.epizy.com/erbe_vio_300s_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/what_is_the_psychoanalytic_perspective.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/38932866880.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_off0000c93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93D 4896 bytes
SHA-256: fd63c5318da6f78076d1ee69f5e4167eebf652ac9abcdf79e05504c098ac088e
font_01_sfnt_off0000da18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA18 10412 bytes
SHA-256: 16afeee66608efd15e30d563974e7d7a12f5d82fa2f9b2a0b16946d32e481097

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