Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7b52213382d627…

MALICIOUS

PDF

73.0 KB Created: 2021-01-28 08:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 3d6e1e58a94f5047be6c8c4c8a9ed836 SHA-1: 31f460f4d464e0939ad7d1e8c5910c629fb7147d SHA-256: fc7b52213382d627cf5c3d6c83d897035d1cd8cf2874e581ac58739d99038eb1
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/123?utm_term=strategic+management+models+and+theories In PDF document text
    • http://zaxobus.iblogger.org/airbrush_templates_stencils_skulls_free.pdfIn PDF document text
    • https://xutepokukofegik.weebly.com/uploads/1/3/5/3/135391302/4019344.pdfIn PDF document text
    • https://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/c695dc.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/35754808923.pdfIn PDF document text
    • https://cdn.sqhk.co/fapebenu/cIOjcrP/36900684807.pdfIn PDF document text
    • http://dezuforupom.iblogger.org/5870449862.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/8422065.pdfIn PDF document text
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/1a50ff286ba.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/Hhbqkgc/galaxy_stars_mario.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/sedimeraxufi/gevozamudafu.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/camiguin_tourist_information.pdfIn PDF document text
    • http://muresapidun.epizy.com/basic_balance_sheet_equation.pdfIn PDF document text
    • http://xalesikejuxo.epizy.com/xiriwikezogibilaletuni.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/uc_browser_for_java_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/bloody_roar_ps1_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/99881009895.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/fuxotitusolasopu.pdfIn PDF document text
    • http://gotuziput.epizy.com/bavivedap.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_off0000e159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE159 5456 bytes
SHA-256: 7979a55af5547068bed18378a3636cf7206ff0af444ab02ecce2922ba8e65a92
font_01_sfnt_off0000f3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 10380 bytes
SHA-256: cf21a957a459b1e94d0381978c0f36bfc766d59c66fdd50d394d70c85230a1ee

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