Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe48239864cd5e80…

MALICIOUS

PDF

73.1 KB Created: 2021-02-13 08:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c6db1a09c43053b445d7661cfc2cd89b SHA-1: 794f7a38a729368f04e29510e6eb5a53e098f8f6 SHA-256: fe48239864cd5e80588a31e8c472ebf3001ef779877a03e18d7272e0774a6733
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=bang+bang+movie+song+ming In PDF document text
    • http://mamontov-net.cc/1011300730yhlna.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/idiagcd/instagram_captions_and_quotes_2020.pdfIn PDF document text
    • http://hopecommunitynaz.com/71594142011nwb1g.pdfIn PDF document text
    • http://pakamid.22web.org/regulatory_reporting_tools.pdfIn PDF document text
    • https://vudulami.weebly.com/uploads/1/3/5/9/135964857/ca5b956a.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/fepiwemufujeru_golajofowigefuz_polerofuvaliva_nudol.pdfIn PDF document text
    • https://wabalolosezuluf.weebly.com/uploads/1/3/4/4/134462862/mukirulezonegej_gorukajezo.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/gupawupigawono/jigemafop.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/54407936922.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/horizontal_analysis_interpretation_of_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/so_brooklyn_instrumental_free.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/alliance_leveling_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/1749383512.pdfIn PDF document text
    • http://dizakopalelur.epizy.com/dukamuxizowegutojo.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/siwokurisakonuludevom.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_off0000e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 5128 bytes
SHA-256: b4caee597ef3f0fbab7d4837b6557613a1b4d4e8451f4d641795c98e3f3914c9
font_01_sfnt_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 11244 bytes
SHA-256: 2ae6276f298b22a6a0711847deae0a315e0505fc5d2dc49770ecc95950f2460d

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