Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb2e28d084029c8…

MALICIOUS

PDF

83.8 KB Created: 2021-02-18 14:19:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4569aa2f54ff3cbacc77734a417e62cf SHA-1: ad80138680aa288cf404393eec1baee7455f3672 SHA-256: bdb2e28d084029c8fb5ff73c372893b5b85bd3448cfee9609adcec447f7408e9
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://crophysi.ru/123?utm_term=rosie+revere+engineer+pdf+free+download In PDF document text
    • https://kiwitelovig.weebly.com/uploads/1/3/4/3/134358902/4786908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_6019b3a153fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_6012247198349.pdfIn PDF document text
    • https://vejanozamafiz.weebly.com/uploads/1/3/5/3/135351199/desetefagobare_rulibozulibuta.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/1528975.pdfIn PDF document text
    • https://repiwolaz.weebly.com/uploads/1/3/1/3/131381539/dororanetu.pdfIn PDF document text
    • http://pafugiwerokamez.iblogger.org/chrome_offline_terbaru_2018.pdfIn PDF document text
    • http://poruzur.iblogger.org/qradar_dsm_guide_7._3.pdfIn PDF document text
    • http://mebets.xyz/6305339460j1yt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408174/normal_5fc84ddea0e24.pdfIn PDF document text
    • https://regakoxunurur.weebly.com/uploads/1/3/4/3/134380337/fudamazofunoweto.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/xomepixo/aamir_khan_movies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/miguvovobovenimowovo.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/eu4_centralized_or_decentralized_bureaucracy_reform.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/jubawebofirogeziwenep.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_off0001074a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 5368 bytes
SHA-256: 360cad0d0c945c1e4fc5eab7ee06a687f4e5ffaa07040db1b685b123972deb1c
font_01_sfnt_off000119bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 11460 bytes
SHA-256: a5e8804bd4722b9167f95953d8442a43b28041cec4dc325a4ce82f9cce3ed652

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