Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee12abdf975c5a0…

MALICIOUS

PDF

72.3 KB Created: 2021-05-26 22:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7c0ddacd5a6adb202015a6ebf9bae266 SHA-1: 5eb7fb0c162ec5180c01f24d1b578e6220561d4b SHA-256: 5ee12abdf975c5a0b64c5229ef68866d64c13890e7ecb6ffcf40d1c6905155ee
164 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. It uses an invoice-themed lure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://crophysi.ru/strik?utm_term=sales+order+book+template PDF link annotation
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/gefamat_walatozejugo_getafuvavev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445333/normal_5feb1bc1315c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_60483a7eda214.pdfIn PDF document text
    • https://jinuwipalo.weebly.com/uploads/1/3/5/3/135332432/c455c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_604ae5f6e7626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_605830d713ef6.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/mugoxepi_wufagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_6041a4748ceb4.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/0cb43876-8af7-47cb-85fc-0e48b4962bb6/91780649419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e40f1a07-ce0c-4704-8539-cadbff850bf3/kinemaster_pro_mod_apk_download_apkpure_without_watermark_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a8fe71-2648-48bf-a7fb-4d1f60e37253/hiking_merit_badge_worksheet_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598e5128-cdf1-4429-a5c0-76a5914db62e/what_is_the_order_of_vampire_diaries_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a61246-0207-40d2-993e-f273cb2b38f6/87829871836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47466d0b-d76d-4232-94c1-7eb97c4294f5/tuludari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0bb7cba-a5ed-4188-9d30-58a380561f90/74164875040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90afc957-d479-4f81-ac64-c65168f1da03/76907049163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2158a37-910b-45cc-9429-9273ab1c774a/solving_rational_inequalities_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82518b79-7cc5-4552-bcc0-29340b38f8dc/75893767397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e106e3bc-f15c-4601-8d50-3ca046655072/buddhism_for_dummies_free.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_off0000ddbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBE 5412 bytes
SHA-256: 203fdaca32ad2429cac9df88d8081f13054f4402e0e7231b11040561609b0e99
font_01_sfnt_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 10612 bytes
SHA-256: 757f2b0b82124ac83d8d03b2eccee6541f5c453630e9a7c17bab52c9b296bb8e

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