Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a6f090e8a3f020…

MALICIOUS

PDF

71.1 KB Created: 2021-03-03 09:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 96d31aac7bfb55810b100721d095024b SHA-1: d0ca7f1b579e8fd7b777adbadd207f0520684a88 SHA-256: 76a6f090e8a3f020250559333b50dbc77859351df1f5a9eb53959dfe103e0f0d
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://gimoguvi.ru/award?keyword=adobe+acrobat+pro+dc+edit+pdf+tutorial PDF link annotation
    • https://nenawobu.weebly.com/uploads/1/3/4/1/134131353/6864907.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/vurumapulope.pdfIn PDF document text
    • https://benejawu.weebly.com/uploads/1/3/4/1/134131543/3667c.pdfIn PDF document text
    • http://winoraama.space/795291003472gw44.pdfIn PDF document text
    • https://bekodezu.weebly.com/uploads/1/3/1/8/131856725/8283655.pdfIn PDF document text
    • http://form-copyrightservices.com/warframe_orthos_buildh8twf.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/bededuxotulapil/any_facebook_private_video.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/rules_for_writers_7th_edition_publication_date.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/46227589661.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/fifugogizavapuxogojike.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/88344886181.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/11687974868.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/intra_family_loan_promissory_note_template.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/binding_of_isaac_afterbirth_mom_transformation.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_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 5100 bytes
SHA-256: 2277db087e0bb297d6b659a642e93dfaa3b10ecbdcd73dcda8c708db06dbd3a9
font_01_sfnt_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 10184 bytes
SHA-256: 41e037914831c4d04c08768105368e16facede049a4685f6b3a3ac6f256d74c3

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