Malicious PDF — malware analysis report

Static analysis result for SHA-256 8adef7dec80da490…

MALICIOUS

PDF

72.0 KB Created: 2021-02-25 13:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d985fe5e6e054dd063a96e4a7d607080 SHA-1: 74d84c24ca8aa6e6d9fac0dbac5587f3be3859c9 SHA-256: 8adef7dec80da490f2e2b780f52f49e636e9b7f1e2e2c1bbf820cc5cda296c80
136 Risk Score

Malware Insights

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

The PDF contains a high-confidence ML detection and ClamAV signature for phishing. It includes a heuristic indicating an image lure linking to an SEO redirector, specifically pointing to 'https://druttle.ru/wix?keyword=pocket+guide+to+public+speaking+w%252Flaunchpad'. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=pocket+guide+to+public+speaking+w%252Flaunchpad PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373304/normal_5ffc631fa5b70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369142/normal_5ffec32ed50be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484812/normal_600816feb7f8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_6002e9072962e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_602fcfba8ac69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490365/normal_5feaef2ea6bf7.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/52414644370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_600e0563bb8a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5fd9031ec567c.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/baxadelefofibuz/dazabiziw.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/kapesudujupugajuzetobor.pdfIn PDF document text
    • http://dewelimu.epizy.com/87349764197.pdfIn PDF document text
    • http://jabepujun.epizy.com/batching_plant.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/ielts_writing_sample_answers_task_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/melodamujivixomip.pdfIn PDF document text
    • http://wajifinome.epizy.com/cal_king_fitted_sheets_sold_separately.pdfIn PDF document text
    • http://fimuwudefixolet.epizy.com/minecraft_bedrock_pc_free.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_off0000c6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D3 5572 bytes
SHA-256: 53882d21d3c5de817c84754963bd3c3eb31c394d48aa9262f6a7548e0cd57afa
font_01_sfnt_off0000d9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E1 10280 bytes
SHA-256: 37696ce032a92b6b889d33760312cf14041e8be23c32aa8adb63dd8a4c12fc98
font_02_sfnt_off0000fd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3A 16084 bytes
SHA-256: 29b8095464fa9501f2379a4c43ca3ba1b1df604f87f2abcbe11fa9bdafb8ec10

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