Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55e8ad4c1412918…

MALICIOUS

PDF

69.1 KB Created: 2021-02-25 00:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: af31edb3b1968b33e2ba05f3dab03d57 SHA-1: deeecff623e74d0cb7bf9e3e3da7a94d9c99b105 SHA-256: e55e8ad4c14129186f9dd6b7bc3b3c12dfa495daf2e554358f43f6a8b3344101
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wb?keyword=how%20to%20reset%20engenius%20eap600 PDF link annotation
    • https://cdn.sqhk.co/deloreba/eXgwVAC/piggly_wiggly_juneau_store_hours.pdfIn PDF document text
    • https://nufusuninad.weebly.com/uploads/1/3/4/6/134609023/47452ebc.pdfIn PDF document text
    • https://molavose.weebly.com/uploads/1/3/5/3/135350427/mixinogivoku.pdfIn PDF document text
    • https://cdn.sqhk.co/putepirapad/gDpdQeO/world_bowls_championship_2020_winner.pdfIn PDF document text
    • http://chambrehq.xyz/what_is_the_difference_between_plantronics_voyager_5200_and_voyager_legend6p97u.pdfIn PDF document text
    • https://zugipevewepa.weebly.com/uploads/1/3/1/4/131483317/03ebc7f.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/jjnhdjb/maximum_cardinality_set.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/kubafezin/67760453919.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/inequalities_word_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/28861637177.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/jufitedefarubiduzikev.pdfIn PDF document text
    • http://xegiseko.epizy.com/71779410976.pdfIn PDF document text
    • http://bupofisawum.rf.gd/motorola_s11-flex_hd_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/kadamba_video_hd_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/24791191802.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_off0000d238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD238 5304 bytes
SHA-256: 6eb818086dfd5ed10992ffa3db24af8ba46e2e0a3e3a1530d5d61b5625e82d97
font_01_sfnt_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 10300 bytes
SHA-256: ad07579fa507cf63a46c25c07a808c35d9389ed5301221e8ddc5453445bad815

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