Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0fa40851b8c6ce…

MALICIOUS

PDF

67.7 KB Created: 2021-03-14 16:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 747524f6c9346d4eb664bc726feb18f1 SHA-1: c6d9cb4593784d0840b532624914f0784fd03722 SHA-256: 0b0fa40851b8c6ce31055d681fa930b0f9e50247d2d531dd64e19c9012a3ba65
196 Risk Score

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://mezovuduw.ru/award?keyword=personal+pronouns+exercises+pdf PDF link annotation
    • https://ritukananikunid.weebly.com/uploads/1/3/0/9/130969552/wadepidanumizer.pdfIn PDF document text
    • https://weneboremuneje.weebly.com/uploads/1/3/5/3/135317625/renuju_wubakalimurino.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/passione_canzone_napoletana_spartito.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/bdb63a49f69dfe.pdfIn PDF document text
    • https://fafafupoxojamu.weebly.com/uploads/1/3/5/3/135350358/fdab120344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_601a3d782e427.pdfIn PDF document text
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/36aea46f7.pdfIn PDF document text
    • https://kukonugaxa.weebly.com/uploads/1/3/5/3/135327287/goluf.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/buzoribi-gidufo.pdfIn PDF document text
    • https://gusefokujugox.weebly.com/uploads/1/3/4/0/134040973/jerekotarudokuraxigo.pdfIn PDF document text
    • https://lobavasato.weebly.com/uploads/1/3/1/4/131483685/dupilabexojes.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/newekapaluzekupalobik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404745/normal_6003cf965e1b0.pdfIn PDF document text
    • https://dakezevowefop.weebly.com/uploads/1/3/6/0/136088489/4aff98055ecb8.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/gafedupeba/86651729981.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/dedajedowuxazuzepejekep.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/wilopudokev.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/citizens_advice_bureau_personal_budget_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/34816709792.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/sofoxufowujovi.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_off0000ce7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7E 5216 bytes
SHA-256: 1737ed3777c7b7e31de69fd544c56f02be189e64e4672061eede795bcb514449
font_01_sfnt_off0000e050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 9668 bytes
SHA-256: 91cd2188f00f57e8eaf9c05e73dd2be6de1772c2a9e89ebeeb3eda1ff8f859f3