Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c028b50a0a817b…

MALICIOUS

PDF

72.5 KB Created: 2021-02-17 11:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 65af305e34ab56fb98501de290e3ba82 SHA-1: 6df97b544b4ccc7d06a21f3b1c4e3b175d0b3ef3 SHA-256: 80c028b50a0a817b5ebf30e604345593c9e97979b3acebec0227f66b6c0d9aa5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/aws?utm_term=vampire+diaries+season+2+episode+10 PDF link annotation
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/660adb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_5fe6871ea0922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445324/normal_60034a8f08f42.pdfIn PDF document text
    • http://vusejulene.iblogger.org/namozeluzosekunan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410020/normal_5fc68c202d59c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393644/normal_5ffe28daf292d.pdfIn PDF document text
    • https://simazilojimi.weebly.com/uploads/1/3/5/3/135345327/riziketexutevod.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/nojufi_nevib_dofakuwipezavuf.pdfIn PDF document text
    • https://moxitamun.weebly.com/uploads/1/3/4/0/134040854/tizisefifenigap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416495/normal_5ff3d1635088b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fewetero.epizy.com/8931672203.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/xemut.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/397296562.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/markup_discount_and_tax_harder_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/75792859556.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_off0000df8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8F 5364 bytes
SHA-256: afb80ac82cb08e64fc127608b7cfee2d78123f2c6c0ea7405816be543afffe8b
font_01_sfnt_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 10380 bytes
SHA-256: b8c7646f5faf343247753a35c1e905979e5cede37964ef5d72f92ada478ceb32