Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c6047e89bb85d1…

MALICIOUS

PDF

80.4 KB Created: 2020-12-15 05:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8a936ad64d237eba1f026c8be1f7f751 SHA-1: ee41c89b8f42667766707b4dcb5756849d8d8441 SHA-256: 80c6047e89bb85d15d52512a0aba252cacb4cf7d659889b3c82dd6958ad51124
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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
  • 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://traffmen.ru/123?utm_term=free+history+of+rock+and+roll+worksheets In PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/tosaravapagiz.pdfIn PDF document text
    • https://loxutagunepolu.weebly.com/uploads/1/3/4/7/134763456/5495638.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/kamovunuv_mudazubegez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0ecedbf71053ccb1052a5/t/5fc1e8daf81c9a2a0ce6df5e/1606543579815/tronco_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07bbda8d-2189-45da-8d20-bc8e19830b1e/poptropica_login_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28400a5bc066edfafdea4/t/5fd1a462ef89ac6683734206/1607574627148/marelojusuputakiridujek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d5be12facd59cec62577/t/5fc73d07a3696915e221559f/1606892808675/puwevanaxevululasesada.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/fbi_crime_statistics_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/10491175893.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/81428691678.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1015360f2895dc1e86a3c/t/5fcdf8e733187724c416155f/1607334119499/country_music_female_artists_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e60b24b06a7eb3ff207b/t/5fc10f9da97599144e1cecc2/1606487971675/long_island_city_weather.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/51281196374.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 5320 bytes
SHA-256: d0e0300b1a0c41919d87610023590798e5c45c15fd2e97a86c53c1ea84bee47c
font_01_sfnt_off0000f9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DD 10764 bytes
SHA-256: 1c89395d005ff32698513c29c9268a8d7d5ca3b5b139b226c3e515ed1cecd0f0
font_02_sfnt_off00011ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED4 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3

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