Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b641e3ff41f32a4…

MALICIOUS

PDF

85.6 KB Created: 2020-12-22 03:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 491e24bc9f8f2f9f3ec412d7c83bbe3f SHA-1: 9f32ed1130ea1e4f4f439eca1ff679d58ecbed1a SHA-256: 0b641e3ff41f32a4a4c448fcc5ae76fea2e6259dc66ca9288adf50c6d8d824bf
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/aws?utm_term=endless+love+the+myth+piano+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414866/normal_5fb346fa3ea1a.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/d7482605a03d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492250/normal_5fc5725b27834.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b695100-e39a-46b4-98aa-dd1d74451282/gogarijepivunevowilirute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e43625-39f1-48fe-a44b-e9e427f4e3f5/82318617615.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/first_10_amendments.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/35418194629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051974aa-91e0-47bb-a70d-6b4a4864049d/21273701477.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/tuduxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1034b6609fd0ee791ebdc/t/5fc5ee47645712565408b57c/1606807113064/pit_boss_electric_smoker_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2bb02085bf90c0e0909f1/t/5fce23567ae85b53b2bac2a6/1607344983043/mupuxawiwetov.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/reference_letter_for_internship_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5368b116eb00e3c682b4c/t/5fc822a892e74531f3bf815c/1606951594791/fafox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceba72f527e820f03c2469/t/5fd6a97772b1137fa981062a/1607903607929/free_spelling_test_template_10_words.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/windows_2000_keyboard_drivers_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0243b69c-2a74-4105-9109-4309f6899108/41783668922.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011a60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11A60 25276 bytes
SHA-256: d9188f8744c2a9ad87ebde0227dcbff697b9a9192344816ac6483e4236603670
font_00_sfnt_off0000ca70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA70 7204 bytes
SHA-256: bf12172582ba5ee2168503635e5e96806eca97d012ce6e1bf0f65f761dc3bbbb
font_01_sfnt_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 5220 bytes
SHA-256: 7045a0527d68ce2c43f70a713b70b3934d9767f79746c12f18f7178eba79229b
font_02_sfnt_off0000f410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 11120 bytes
SHA-256: 345447ca7e74eee6aef9afeb39a4c0c90f8aed81356e51a1f796773afabc4b46

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