Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e3df799fabc50d…

MALICIOUS

PDF

71.7 KB Created: 2021-02-26 05:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 668d11bb586b811fe277ad7f936a8e5d SHA-1: 32222cb2c230b6d26cee6565bc97604655509226 SHA-256: b1e3df799fabc50df8892674e8c83b12204547528a8e56cce09e33ac8117e079
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=the+original+rider+waite+tarot+deck+pdf In PDF document text
    • http://trikolor.site/how_to_loop_audio_in_premierea5fbm.pdfIn PDF document text
    • http://lunesygets.xyz/posomabaxivofawanei9aee.pdfIn PDF document text
    • https://panesiwosejel.weebly.com/uploads/1/3/0/7/130739396/b85ab89869.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/sotiwuvedoki.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/wosewa.pdfIn PDF document text
    • http://lowazaz.22web.org/abaddon_dotabuff_guide.pdfIn PDF document text
    • https://tejalegevususo.weebly.com/uploads/1/3/1/6/131637178/961060.pdfIn PDF document text
    • https://zegijavevezedoj.weebly.com/uploads/1/3/4/3/134309525/voxusivux.pdfIn PDF document text
    • http://jelebojibujij.iblogger.org/7185169415.pdfIn PDF document text
    • http://malapiwo.66ghz.com/sitiwesasakiwepafazaz.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/voxulija/fobugajuxutexofob.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/english_for_auto_mechanics.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/sapivojujulawonezivotele.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/72318734988.pdfIn PDF document text
    • http://fajukowopod.epizy.com/nelco_sewing_machine_price.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/jolofa.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_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 5344 bytes
SHA-256: 93756825fbdc3805443a052b2f8de679b713093adaa1d2a129e6c380b8e7cce8
font_01_sfnt_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 10292 bytes
SHA-256: ae2bd4027f01c068fc5dcac04584c4c62b013c01505971d3e18f8929ebaa4eae

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