Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed93fe99554a392…

MALICIOUS

PDF

75.8 KB Created: 2021-03-01 23:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5cd11ac25fe18cde3bdbc5264c8bd0a3 SHA-1: 485336ce205288ffac23ab0abe966a10a7e1585a SHA-256: 6ed93fe99554a392df67586ed595fb051b82c743ca78746f465e0ce51fd1a4b6
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to a link farm designed for SEO manipulation. One prominent URL, 'https://kuzutuzo.ru/strik?utm_term=why+asia+is+important', appears to be a redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malicious content through these links.

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.
  • 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://kuzutuzo.ru/strik?utm_term=why+asia+is+important PDF link annotation
    • https://pexagizim.weebly.com/uploads/1/3/0/9/130969673/polivof-vakotekamovo.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/noxexogokafi.pdfIn PDF document text
    • https://bumilumijoxaxuv.weebly.com/uploads/1/3/4/4/134497753/serukasajopu-texobut-dovobar.pdfIn PDF document text
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/relizo.pdfIn PDF document text
    • https://jamekefexufi.weebly.com/uploads/1/3/4/8/134866820/terav.pdfIn PDF document text
    • https://sebikiwar.weebly.com/uploads/1/3/5/9/135962157/c3770.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/fuvug-dowunivikon.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/Q9hb160/lovelace_medical_group_roswell_nm.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/vekodupiwarobi/i_size_car_seat_guide.pdfIn PDF document text
    • http://kenefokugoxetu.rf.gd/kenmore_washer_dryer_combo_drain_pump.pdfIn PDF document text
    • http://tugefewose.rf.gd/b_q_disposable_dust_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/mn_harassment_order_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/24951175962.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/ge_spacemaker_microwave_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/53237754440.pdfIn PDF document text
    • http://vapodizasogore.epizy.com/adding_and_subtracting_polynomials_guided_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/84801516865.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_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 5140 bytes
SHA-256: 66966e0e8772b4cd7042fa3186d8b25693938ed800ff7a58c991fbff4349390f
font_01_sfnt_off0000fd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD41 10820 bytes
SHA-256: ad1b153d38b1b700100c697edc71b3e011f732dd4d5485bc7ee466975583285b

Open this report in the interactive analyzer, or submit your own file for analysis.