Malicious PDF — malware analysis report

Static analysis result for SHA-256 127aaa22803b5159…

MALICIOUS

PDF

72.8 KB Created: 2021-03-06 07:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2cb730407d0d7937282c92eea3c59cc8 SHA-1: af6d85c908188a010ae5da5ecab1a90896134f8b SHA-256: 127aaa22803b515931c3054c8e2ccb5ebec912c18c9ae2298d6d6f94b31b713c
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://baarspo.ru/award?keyword=identifying+place+value+worksheets+5th+grade PDF link annotation
    • https://xuvelusikifaza.weebly.com/uploads/1/3/1/4/131406656/5445929.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/56037417611.pdfIn PDF document text
    • https://jonumupemusegiw.weebly.com/uploads/1/3/0/8/130874210/kofototoke_xovamixozogep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_5fdc5e766666b.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/9dd203b6f8ac57.pdfIn PDF document text
    • https://fugebigejajifad.weebly.com/uploads/1/3/1/4/131406613/23fe9.pdfIn PDF document text
    • https://tiguxenejizowi.weebly.com/uploads/1/3/4/8/134899735/babotijaxek.pdfIn PDF document text
    • https://nogudoge.weebly.com/uploads/1/3/4/0/134017621/kaxemodixixe.pdfIn PDF document text
    • https://fapufeloku.weebly.com/uploads/1/3/1/0/131071019/203.pdfIn PDF document text
    • https://vudunige.weebly.com/uploads/1/3/5/9/135981242/wurobuvuvexep-rusaguzudag.pdfIn PDF document text
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/700aacb9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5fcb63ed5cc0b.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/pojikovewijeja/countable_and_uncountable_nouns_exercises_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/harrison_bergeron_anticipation_guide_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/befaxopenexepomope.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/hamilton_beach_oven_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/motufasupamev.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/84290858831.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_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 5796 bytes
SHA-256: 3780d6c8afb803d8ba56927d3c364fe0483ba845517993ce9dc0dfed00f6f9cb
font_01_sfnt_off0000f3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 9940 bytes
SHA-256: d4bb3ebf8f0c339e029f93ed8f310026405fe2a17cfdeae6e03c36623ef080c3