Malicious PDF — malware analysis report

Static analysis result for SHA-256 50b3deb57c704946…

MALICIOUS

PDF

85.4 KB Created: 2021-03-17 03:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 69cc28bed7d6faa6713c6c766bde4d8c SHA-1: 865b002e30c688c663ce36e722f08aa915b9c754 SHA-256: 50b3deb57c70494652cf3aba6be752788186ea4b9279d4fc1a1c1597f2ae3a82
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 0.9997

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://fokemale.ru/wix?keyword=lexmark+c746dn+user+guide PDF link annotation
    • http://baramijotafexo.mypressonline.com/how_to_cite_a_document_from_a_website.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/labodigosujubusonowemator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_5896fcc402a54f1881068919103093b8.pdf?index=trueIn PDF document text
    • http://beturatigamoli.epizy.com/example_of_grading_sheet_in_college.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/how_heavy_is_a_55_inch_samsung_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c41f16c-57de-4bde-adc2-ec3088d1ae41/the_great_gatsby_chapters_1-3_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/70316321938.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/95210401683.pdfIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_1bc8414471a64ce2ba0f69048c7a618e.pdf?index=trueIn PDF document text
    • http://nemagigorame.epizy.com/sijivuxupuvufujij.pdfIn PDF document text
    • http://sawurawefivovo.myartsonline.com/canonical_form_of_pde.pdfIn PDF document text
    • http://godanalig.epizy.com/microsoft_access_2007_free_for_mac.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_1198d4308060410e81dc76220c4ab393.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_cbc5c4a33b0c469283142b3bb86564e8.pdf?index=trueIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_4bfd7b00c92c4729aba56c6c531e5a1c.pdf?index=trueIn PDF document text
    • http://nadovudeduxawos.rf.gd/guide_gear_rain_suit.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_49241a0db7cb49d5b57c6cdb2c7a0682.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/7062965734.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/free_vpn_for_android_quora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59470489-cef9-4ca6-b4f2-7ac8262b076d/valoke.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A8 5312 bytes
SHA-256: 70a41d93499337cab4f971361476bee49097dfd36d576aaa2813ffce87298d09
font_01_sfnt_off0001169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 10396 bytes
SHA-256: 43758acd124ab5899d36cde845b84661ef1d692666c3d660e7c06e33f3dcb9cc
font_02_sfnt_off00013a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A03 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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