Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3b1ea812b28e99…

MALICIOUS

PDF

68.6 KB Created: 2021-03-15 20:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 90465fe7da895fb97610231f803673af SHA-1: 926964d5e32be5ed1e2ae1d3d06fc9c940558c9d SHA-256: 2e3b1ea812b28e99b95e703d2c2271d477763c32ddf892312cd8565488f55517
186 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 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/wix?keyword=what+is+the+cub+scout+promise PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476123/normal_60388649b1db4.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/wuzenutefezurobofena.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/7799807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_602b0c93bce73.pdfIn PDF document text
    • http://update-win20.online/why_is_my_window_ac_not_cooling_my_roomziuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_6012e167a2654.pdfIn PDF document text
    • http://nubolats.xyz/13043796593wuaxq.pdfIn PDF document text
    • http://8gusevshop.website/soguwpn37q.pdfIn PDF document text
    • https://xiwirananuwiro.weebly.com/uploads/1/3/1/0/131070481/792f10471f12.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/d49cb8.pdfIn PDF document text
    • https://nixejinalir.weebly.com/uploads/1/3/4/3/134321479/9902c4184c8.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/a2fac8f9-8a58-4913-a7f2-d29f0d512038/beats_studio_3_wireless_red_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42431ee-59a7-4964-80c0-235ca75e426d/how_to_find_your_chinese_zodiac_sign_compatibility.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/what_are_the_contents_of_a_book_review_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90a988c-dabb-4973-9177-f64b38efc7c0/mivebobeberifokozaluboro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b418204-e368-4bfb-be43-bd6e1d488f39/jawigos.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/excel_event_planner_schedule_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/76028194282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a530af-8e6b-47f8-9f8e-74c8fd7f84a4/hp_42s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/dnd_5e_character_sheet_editable.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CD 5296 bytes
SHA-256: dc88b8cc160e071cde8da787ecbbc35ebfd80725f95c66d3b108e16522a0b10f
font_01_sfnt_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 10192 bytes
SHA-256: a86250219766b2e4d7c7bb2c72448cbada3cd116fd78f83d6000352e6c775307

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