Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1e98842a5f352f…

MALICIOUS

PDF

70.8 KB Created: 2021-02-25 03:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bc071e67e155cb7b96f50376a66c1794 SHA-1: d28522327220d05281910c45ca35a43f8ee0d969 SHA-256: cd1e98842a5f352f0f10ec6dd73e088c0793f5dcf1375b0b83f7d9996ac13ea6
196 Risk Score

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://bologen.ru/strik?utm_term=creative+sound+blaster+x-fi+titanium+7.1+pci-e+sound+card+sb0880 PDF link annotation
    • http://shtangennstutkupitseychas.xyz/how_do_you_calculate_the_output_voltage_of_a_transformerf49as.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/iipcjCC/75438062128.pdfIn PDF document text
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/5399148.pdfIn PDF document text
    • https://jibanexoruna.weebly.com/uploads/1/3/5/3/135338247/6507764.pdfIn PDF document text
    • http://kmikaerfs.ru/what_is_the_best_solar_security_lightvhq04.pdfIn PDF document text
    • https://cdn.sqhk.co/lajakukilo/6hdifuc/3d_wooden_puzzle_green_earth_yellow.pdfIn PDF document text
    • http://cpskras.website/44806205137o3kb5.pdfIn PDF document text
    • https://cdn.sqhk.co/dusujukakal/haeqbja/mobile_recharge_through_amazon_pay_balance.pdfIn PDF document text
    • http://lavkavkusa.store/nugofejuwimatul9hz1d.pdfIn PDF document text
    • http://czecheducation.space/ccdc_23dwauf.pdfIn PDF document text
    • https://cdn.sqhk.co/nowagenika/hgsthgJ/table_tennis_serve_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/Gsyhdhg/electronic_products_examples.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/tinezedu/kivufukuj.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/best_pop_songs_2019_playlist.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/beatport_pro_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/gikul.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/game_aquapark_io_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/cialdini_influence_social_proof.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_off0000d593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD593 6004 bytes
SHA-256: f2bd2907783953114e8db17517f6f6240be3c10a60c336f0a1d70ba8ff78b40c
font_01_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 10400 bytes
SHA-256: 8b31476122b807300b00e4f9121258d57378f1a242bc4849959142a4ab69e898

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