Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f808baca37de09…

MALICIOUS

PDF

63.4 KB Created: 2020-11-24 12:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: f1bb6863bd6ba56fb2f3f0dc5774f464 SHA-1: 81e7f24af84d648dbb59062d2fd95505e447adfd SHA-256: d6f808baca37de0926ac8b38ab4aaa60bf4b38120d91f01c01792b95f9cd1199
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://traffnew.ru/strik?utm_term=paridades+do+cubo+4x4x4+shipping PDF link annotation
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/lizawijexoguja_tovurijijafov_silomuz.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://gesinanafu.weebly.com/uploads/1/3/4/4/134481382/a43bc740d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b031bf4d-c156-4dc0-8655-180bd8d27426/the_sociology_project_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/karel_apek_bl_nemoc.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/83568774848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10852199-d58f-4dd1-b9df-0155ce018fbb/tidagodogevevuregiruxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e833ff-a822-4548-9d96-1f7d2fe624b5/springboard_geometry_unit_3_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/buvodigefek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22c5720-898c-433b-832c-948292e6552f/refotejunexedekuxezute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5701317f-fd41-4ad8-8a72-796543068a09/35471805439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c777036-e6e1-4710-bd33-b530d64cc73a/chat_zwamel_maroc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1611e0cb-359a-4d73-9042-d18b48548cc2/barbie_and_puppy_adventure_full_movie_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/in_the_crop_lien_system_farmers_could_grow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61144335-c9e9-4402-b5d2-bd9d2de8188f/93613577347.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_off0000b8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DF 5600 bytes
SHA-256: efd6a894790deeed3c5c72de2be8218828073ce1d4f4131d6072409ef4b2106c
font_01_sfnt_off0000cbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEC 12028 bytes
SHA-256: 82d3c9bb00a68732976d95606dd40be053e5bd59449bb2133357a9afaaf90551

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