Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57142034ecb5149…

MALICIOUS

PDF

85.3 KB Created: 2021-05-28 10:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 11846d9fc0d930a6c0b8c6d4d7970191 SHA-1: db63c5d149af0b8699986284188e1fa79975690f SHA-256: b57142034ecb5149f6474816cab80b84cdb3e2ead1838de738dbd25e11fae1d7
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://kuzutuzo.ru/123?utm_term=a+guide+to+spirituality+without+religion PDF link annotation
    • https://pukewuvidepuf.weebly.com/uploads/1/3/4/3/134321324/vizetajikekopuk-demixelof-rokotoreka-luziba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459463/normal_5fca0bfbbd7ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470826/normal_6029245f3e80a.pdfIn PDF document text
    • https://bafejavug.weebly.com/uploads/1/3/4/7/134737311/90c864d1.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/fd7aa1.pdfIn PDF document text
    • https://ponekuxu.weebly.com/uploads/1/3/4/7/134747949/2281385.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://uploads.strikinglycdn.com/files/82cfd9d4-0eea-46a4-9edd-fc928f876f50/does_newt_die_in_the_maze_runner_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f370b55-0cda-4fe4-84e3-a90a94842c41/my_samsung_front_load_washer_will_not_drain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343f7592-daaa-4b5e-acc5-769a0f19993a/motevujozituf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0089c6-5e62-43a0-a3d1-82a6e004120f/tugudav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1614b6db-5853-4bab-abd0-af35a3593c73/jezipodawetewikeginej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8adbeb8-858d-40a9-9a30-94f4879c7ada/resumen_del_libro_bajo_la_misma_estrella_capitulo_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f201aa17-b062-4fce-abb9-b140ff67df68/wusukapaduzuzitusimeluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0cd1fb-82d4-47e8-8424-251f6829ca4c/nerowowup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3b9a74-6de4-4598-a035-c5e22eed0cc8/petsafe_drinkwell_fountain_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959a61b3-741f-4565-8fe4-52cc81172c3e/zilubebubedisutitib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e435950-92c2-4b65-93dd-9eebbb149a46/30597357047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a732347c-ff03-4533-a0c0-b8d5e42046c5/36045680597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c032be3b-22d9-412d-95a8-4b6ce9287843/jujenenojumujubek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d980ef48-7560-4b11-a3cd-b949a625fe62/the_office_us_scripts.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF10 5284 bytes
SHA-256: abbff7136b2e8ed3deeb7a08ab4fd3787e8db875c39009b8609684ef54faad1b
font_01_sfnt_off00011112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11112 12092 bytes
SHA-256: 8e6bbd60e058709ca09c69c997ee5fe48bb32a20d325c20f19184506024f7e33
font_02_sfnt_off000139b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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