Malicious PDF — malware analysis report

Static analysis result for SHA-256 556325b57f53f1fe…

MALICIOUS

PDF

68.5 KB Created: 2021-02-12 11:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 62f1701e7b1dca0b714d9ba239f683ab SHA-1: 5142eaa95dd6ef1868407c39b96fc81b1d609caa SHA-256: 556325b57f53f1fecc31f5851d99e4bb244b90fd92192e9c86b2dda452c07a33
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://druttle.ru/wb?keyword=physical%20fitness%20merit%20badge%20workbook%20answers PDF link annotation
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/b051b1.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/aashiqui_2_movie_song_hd.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/4dc5f85956c.pdfIn PDF document text
    • https://nasesugafod.weebly.com/uploads/1/3/5/3/135387958/kiwut_fafadigezip_tasosawav.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/8bf460.pdfIn PDF document text
    • https://wavidamos.weebly.com/uploads/1/3/4/3/134316051/labuxuxuxelu-besozodokaferu-furekaxi.pdfIn PDF document text
    • https://suxapenogabako.weebly.com/uploads/1/3/4/6/134602080/boror.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/wupixufekijax/mejobefomefaruxanoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/xelunekiwasutivizufevome.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/daily_mirror_crossword_puzzle_answers_for_today.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/65825090687.pdfIn PDF document text
    • http://zoloxufiz.epizy.com/bishops_cleeve_secondary_school_ofsted_report.pdfIn PDF document text
    • http://povusesa.rf.gd/arbor_day_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/pasexija.pdfIn PDF document text
    • http://pitugozuput.epizy.com/pudati.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_off0000ccc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC3 5836 bytes
SHA-256: d2034ae3c8f61505834439ea2aa6d7cba46dca14dea675534b6e4282e452e64e
font_01_sfnt_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 10616 bytes
SHA-256: 923f359993cc48d9e222e196ac768dcecd26f9f13c01fa63554ce9626d5d75f1