Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56882b565b22361…

MALICIOUS

PDF

206.7 KB Created: 2021-03-20 23:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 07c2bd20585e9b0556dd651adae412bc SHA-1: c022345c890bf0e6b571ae01074643e07a0d74e4 SHA-256: e56882b565b223612a978a0991f1e309d809cefd0b5af53e0a4530f4d85be24b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=greek+mythology+demeter+and+persephone PDF link annotation
    • http://tigesonepovar.66ghz.com/aambala_tamil_movie_audio_songs_free.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/70d4298.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/honda_civic_ek_service_manual.pdfIn PDF document text
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/sevutomalizew-zibifuwuzimujo.pdfIn PDF document text
    • https://ruvararet.weebly.com/uploads/1/3/1/3/131398095/mavoriduman.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/i_want_to_convert_to_word_file_online.pdfIn PDF document text
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/dofin.pdfIn PDF document text
    • https://bixirugabo.weebly.com/uploads/1/3/0/9/130969405/futugabivo.pdfIn PDF document text
    • https://sitibopifug.weebly.com/uploads/1/3/0/7/130740553/komep.pdfIn PDF document text
    • https://jejegufixi.weebly.com/uploads/1/3/2/7/132740716/868a55d26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nelivizazepafo.epizy.com/3440110149.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/wrong_turn_2_dead_end_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c7aedd-f099-4753-a8f3-9d9ac41585ae/46928102362.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/50581917889.pdfIn PDF document text
    • http://kipixuge.epizy.com/nekuwinuzoked.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/cartilage_forming_cells_are_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b2ad47-c3eb-4968-a6a2-311a279f8a74/bse_odisha_10th_class_physical_science_book_download.pdfIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/letter_to_birmingham_jail_summary_sparknotes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B322 5056 bytes
SHA-256: 691cb92339d1e8f72aba83d918750298d0db052c79a708da5a43905ec52046ed
font_01_sfnt_off0002c4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4AF 5568 bytes
SHA-256: f4dd3f130d365f4a05a8f9394cf216be6080203cdceb2d9332408a4afec5a0f6
font_02_sfnt_off0002d789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D789 20556 bytes
SHA-256: a3add132ed77821d8062492893bdda23c1cd388e02e71c8bfc83bef0815d4a2b
font_03_sfnt_off000312f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312F5 17152 bytes
SHA-256: 0378d645d3983cc4831e97b4c282b1dd056d55127d53369c05e666285c855f3f

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