Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d665fdec8e8aa9…

MALICIOUS

PDF

80.8 KB Created: 2021-03-17 16:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e3d38f229b200fa4915d8a37683ba6b2 SHA-1: 4e803dde830508df74b9094fa2f0f7ef64ba45d1 SHA-256: 72d665fdec8e8aa98f82319eb24be394d9d3455aa08194053561498998950394
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting an attempt to create an SEO link farm or direct users to malicious content. The embedded document body, though partially corrupted, contains keywords related to business plans, likely serving as a lure.

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://xezojetit.ru/award?keyword=business+plan+sample+pdf+of+t+shirt+company PDF link annotation
    • http://nesibobivugo.iblogger.org/landforms_and_waterforms_worksheets_for_grade_2.pdfIn PDF document text
    • http://servicesforsupport.com/47348207331yr8t0.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/what_do_the_number_806_mean.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/93465266133.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/beginners_reading_exercises.pdfIn PDF document text
    • http://bivoxuwod.iblogger.org/17022865593.pdfIn PDF document text
    • http://jujavekerubeko.scienceontheweb.net/23286992640.pdfIn PDF document text
    • http://hotsales-com.xyz/dofevazoputumititiwbodkj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_089f32dbade64899a3dfb9171d9d5618.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovibu/best_personal_essays_for_college.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_d2e04682ae9b4f1284b0742e4de07ae7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/food_chain_worksheets_3rd_grade.pdfIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_6f43b457330149dab9b97509217449b9.pdf?index=trueIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_42022fd01bed4e9ab38046c222a18821.pdf?index=trueIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_6c1f8c6dd6974de0884077cd60a570dc.pdf?index=trueIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_9dfe99c1974d4cba9f9f66348394809c.pdf?index=trueIn PDF document text
    • http://bomajada.epizy.com/wevaxopos.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/kibopilolefu.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_off0000fc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 5544 bytes
SHA-256: 1065349925d50446b79fdb088ebfb0021016cf82f3d566cc84f1a3771f9f0c48
font_01_sfnt_off00010f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3E 11880 bytes
SHA-256: 7c75994b84136d40cb9ddbee6fcbd9a796ca9993a3bf6be0b799e046ff7e8564

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