Malicious PDF — malware analysis report

Static analysis result for SHA-256 c405fe5f24a1b2a4…

MALICIOUS

PDF

76.6 KB Created: 2021-04-01 09:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 60e1732ca551fdef711953afec21e71c SHA-1: b00fd74b84f264c9c94900d02a62bdcccea83172 SHA-256: c405fe5f24a1b2a4b9621f65c4541962b4137141d60c02f791ea29ca722451fe
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to an SEO redirector. The primary malicious URL identified is https://leonvi.ru/strik?utm_term=snow+bear+utility+trailer+weight. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://leonvi.ru/strik?utm_term=snow+bear+utility+trailer+weight PDF link annotation
    • http://skidki-day.shop/gmat_official_guide_2019mskeq.pdfIn PDF document text
    • http://ketadiets.site/how_to_apply_for_chase_student_credit_card58149.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/fernando_botero_biografia.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/kelageketisefuv/kojaporolabakakijitawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4914960b-976c-4ca4-a93c-d317c25f14ad/how_to_connect_hp_laserjet_pro_400_mfp_m425dn_to_wifi.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/45482235285.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/95172724617.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/dubaxapuzadeguxul.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/corel_draw_x7_crack_bagas31.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/2013_dodge_charger_pursuit_service_keyless_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2280bfa9-dbfa-42ac-b699-7d1ab220179d/lixadake.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/contemplate_on_someone.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/lspdfr_callout_packs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f078bd-6814-4af2-8627-714920659af9/62525938450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e66e660d-4efe-4b73-8d9b-2f7f9ccd7cef/little_shop_of_horrors_cast_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/change_management_practices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153afd2e-9771-46a0-a892-97145c73133c/84057267568.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/biological_half-life_is_the_time_required_for.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/flat_bench_dumbbell_press_form.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 7

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_off0000efcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCD 5208 bytes
SHA-256: e6d3c857143ce1beeb1aaa8bd3219c61a21d2c79c879f76f32820a69871c8a54
font_01_sfnt_off00010197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10197 10316 bytes
SHA-256: e9c7d5dc2ffd650b476439bff5152b7dabb54f95f5c67f6279a72379d2694919

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