Malicious PDF — malware analysis report

Static analysis result for SHA-256 37674a0d59c43b3e…

MALICIOUS

PDF

42.5 KB Created: 2020-11-08 05:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 819816bb597230515a5dbefc5010129b SHA-1: 0928b949905c36a5faccb779102c615dda6bcb9f SHA-256: 37674a0d59c43b3ee8eb4c2f6d1bc4d86828827dac8cb0debacc9734092f17e8
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafficel.ru/aws?keyword=manual+for+samsung+galaxy+s9+plus+manual PDF link annotation
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/dezajumidawajifulut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fa722de85656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f8afbc7dbb83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_5fa47f5edd5e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f90b157c0a3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://bekagitowura373027609.files.wordpress.com/2020/11/34823658637.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/mokesabij.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/chase_close_joint_checking_account.pdfIn PDF document text
    • https://s3.amazonaws.com/zewavidopexebi/act-1572cpre_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/nonsense_word_list_cvc.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_off0000668b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668B 5552 bytes
SHA-256: ea903ce97c70da5503c0431acaaf165b34f707c667d61cdb4c9684728d1834b2
font_01_sfnt_off0000797f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797F 10340 bytes
SHA-256: ec23096443f5cf7ab38324c3a4c5e1a1d1452f4e88156d357c3d31d5bd6f6ac0

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