Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f05607f4dcedb33…

MALICIOUS

PDF

70.2 KB Created: 2021-02-15 12:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e12b0ad9174341198c8e8b7a30e07cb1 SHA-1: af31478df67c1419306ecad1e89ed66cdde63ffc SHA-256: 6f05607f4dcedb33fe5614661b21a683974baa4a254640e93c01bca74d44a4c6
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=android+multiple+fragments+in+one+activity+example+kotlin In PDF document text
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/12741df.pdfIn PDF document text
    • https://cdn.sqhk.co/senagoxosog/OKhihgE/spirit_riding_free_theme_song.pdfIn PDF document text
    • http://fitness1.space/4853698211n99xc.pdfIn PDF document text
    • http://kataeta.club/bekononikobupajexufav2ztk.pdfIn PDF document text
    • http://dressnbuy.com/7705502252185nb0.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/A1ifDtj/robotics_software_engineer_education.pdfIn PDF document text
    • http://gramnews.xyz/fukaxuvuru5jtdq.pdfIn PDF document text
    • http://zazonowipudu.66ghz.com/cleveland_browns_injury_report_today.pdfIn PDF document text
    • http://winoorama.fun/kuditezovugonoxasotaxafulu72dw.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/jodabiladezot/android_studio_3._6_release_notes.pdfIn PDF document text
    • http://dilowopuvuzi.rf.gd/89037223347.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/favorite_food_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/fufudakazovepatepuwudefe.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/70962495960.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/girl_scout_law_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/54349676845.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/xexibiniwizuko.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_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 5760 bytes
SHA-256: a2acfb7ad680fee989f4f53e544f373113ccd037bc924aee2ae0a130e8595d17
font_01_sfnt_off0000ea82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA82 9560 bytes
SHA-256: f9b390bb911c79f47d5457d8d827579b291003fcc91d0d6771f410b5d748bfce