Malicious PDF — malware analysis report

Static analysis result for SHA-256 57bae49aa05564bd…

MALICIOUS

PDF

76.6 KB Created: 2021-01-30 03:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 5c02fb3def298cfa94d1fda64ef85e15 SHA-1: 6bdfeb08f10353bd00bd05ffdc1fe7ec3f597355 SHA-256: 57bae49aa05564bd02e38135e420c95ff1580edb41e43d31975a3c95310f45b3
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://seumenha.ru/123?utm_term=middle+school+spanish+class+syllabus PDF link annotation
    • https://kajubogoxin.weebly.com/uploads/1/3/0/9/130969430/608749404.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/5fQeMgd/85438620604.pdfIn PDF document text
    • https://cdn.sqhk.co/kamavedes/dbiZRD2/mississippi_palisades_state_park_camping_map.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/moriparebot.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/1176027.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/c4444e415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474192/normal_5fe5419630f15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495550/normal_5fc9bfdf95e6d.pdfIn PDF document text
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/221deaa40dee7f4.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/vukumesoj/new_bollywood_movies_free_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/kitos.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/68138659439.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/50157333429.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/gurikegidewet.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/davis_drug_guide_lisinopril.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_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 5312 bytes
SHA-256: c0d2b6138897e880de9d802e54cbd5308f68da1c38222abbe978ef8e883abfb9
font_01_sfnt_off000101ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AE 10592 bytes
SHA-256: ddb3877f0ff72cba00047dec64387f496589c9a236a6693257a4ff5cd79e7993