Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb06806d2b8f4db…

MALICIOUS

PDF

130.0 KB Created: 2021-03-18 14:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 607955697a53643b5eaa531b962b0208 SHA-1: 5a75e6996aedbedd706d26a6ab47b58dad18ecb1 SHA-256: 5bb06806d2b8f4dbee4a2acf25c521473ffc34ffb6ce7a9026d809554bc43de7
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://leonvi.ru/strik?utm_term=blackbird+tab+ultimate+guitar PDF link annotation
    • http://dedaruk.scienceontheweb.net/pugaxakep.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/susiletifaruxobusiforox.pdfIn PDF document text
    • http://re-capital.ru/le_plan_comptable_mauritanien0b3jp.pdfIn PDF document text
    • http://sarhello.online/good_baseball_boy_namesu0zhz.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/16916309631.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://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_8ec6388f8e8347d3b1939d4975a39bfc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/350179777.pdfIn PDF document text
    • http://sewemira.atwebpages.com/critical_thinking_skills_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/eclass_record_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daad541c-7225-4a89-ba9c-13ce4a28a3c9/jenipudi.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/montana_1948_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b580f84-8a3b-4e4d-8de8-81c6e156c068/vurujawa.pdfIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_112c878c57d14d889c9bec169bbdd003.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c44efdc-99d8-4145-847c-fe2af011bee7/figadurusizebefa.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/jawbone_mic_not_working.pdfIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_7206e51fd80841bfaea7b43c185dee6f.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_500e5554efb24cc89d77c00e73e34f30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/video_er_app_apk.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_f12ffaff9a7e431896c96f65e3551a86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/lack_of_quorum_en_francais.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_9a1f3ca95904479da60e882b0a136014.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ada6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADA6 5000 bytes
SHA-256: edf5e2dbf440e7d3594b1e0e2da2538062446ef01f0df1fca6be99d50fc87b28
font_01_sfnt_off0001beab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEAB 14528 bytes
SHA-256: 0d4d9f4e49f82ef57bf329aa166036351e2594a1cdee0c0d70bdd0f7d774f2c1
font_02_sfnt_off0001eb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB24 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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