Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6daef7d553f776…

MALICIOUS

PDF

79.5 KB Created: 2021-02-18 20:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d4e7a48de90d67aa87204dd8910ffb63 SHA-1: c207fbb4cd2504cdcb784cce9dbb1ab3c46183d9 SHA-256: 3c6daef7d553f77615e6afcf89dd693ac1b3fa49a0ae4ed07d6bfece004b0666
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://crophysi.ru/wb?keyword=maytag%20dishwasher%20troubleshooting%20manual In PDF document text
    • http://teenagetutor.net/zivuweguvodo7lnbf.pdfIn PDF document text
    • http://missunik.space/dejamej5ot5i.pdfIn PDF document text
    • https://bogewugarut.weebly.com/uploads/1/3/1/4/131483108/b13a3ffbb.pdfIn PDF document text
    • http://thrivewebs.com/mavobikh9wtw.pdfIn PDF document text
    • http://ogranicbio.space/gitogivrsfhg.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/paxoxibomarevutoweko.pdfIn PDF document text
    • http://forkidsshop.online/9737484018fhpl9.pdfIn PDF document text
    • http://lozhobelir.space/80726945157i4es2.pdfIn PDF document text
    • https://voxipomawo.weebly.com/uploads/1/3/1/3/131379395/ragujuwuxa.pdfIn PDF document text
    • http://rixiroremijiw.22web.org/wheel_of_fortune_game_answers_thing.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/vokeri/video_call_recorder_apkpure.pdfIn PDF document text
    • http://fufebelanamug.rf.gd/archicad_16_gratis_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/espn_directv_channel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/14545497702.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/28586246822.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_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 5576 bytes
SHA-256: db83bdcfaf4967373649f22d2a8fe1b4272601d515aa1b4f78cd96ca4a55bf9b
font_01_sfnt_off00010d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 10432 bytes
SHA-256: 0ac7ed503ea7e1b002b1e9a83c236fbf88cf99a372873409e7adc54fc981864c