Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aebf4f3c0226176…

MALICIOUS

PDF

83.4 KB Created: 2021-02-26 01:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7a9f17423eca7cad0e81821e5fd6cfba SHA-1: 3bf71653f300314609a5c7c38bf478994fe99f3e SHA-256: 2aebf4f3c02261761fa6351cf3a9cb3e879556416b6ea145bae10283949d05d2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or redirection scheme. ClamAV and ML heuristics confirm this is a malicious PDF, likely used for phishing or distributing further malware. The embedded URLs suggest an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/aws?utm_term=bill+nichols+introduction+to+documentary+third+edition+pdf PDF link annotation
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/458d7.pdfIn PDF document text
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/pemorexesomixagu.pdfIn PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/wabel_serogusidutepi.pdfIn PDF document text
    • https://titanukudolilip.weebly.com/uploads/1/3/6/0/136082060/5011320.pdfIn PDF document text
    • http://fapinudonas.22web.org/zolufewebemil.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/063ed43acd.pdfIn PDF document text
    • http://zagafesujed.iblogger.org/carnauba_wax_msds_sheet.pdfIn PDF document text
    • https://jukirabupunux.weebly.com/uploads/1/3/0/8/130874410/xipak_degomuniwe_tapagorur.pdfIn PDF document text
    • https://zofiludel.weebly.com/uploads/1/3/5/3/135347527/4184830.pdfIn PDF document text
    • https://pufedoxavode.weebly.com/uploads/1/3/4/6/134613169/xedejexexelera-vujuj.pdfIn PDF document text
    • https://jewakazakiven.weebly.com/uploads/1/3/1/4/131437085/saxumive_xelib.pdfIn PDF document text
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/wujef.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
    • http://xogowakowokavuw.rf.gd/94688727185.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/fibasiseterifipixuvej.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/nutakasawugot.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/83851976258.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/rokopisaxiwunoz.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_off0000fa6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6E 5428 bytes
SHA-256: 570394b91709360c75082dc8a1db7c9602c7b16dad4bab10621c8f698d4e0881
font_01_sfnt_off00010cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAE 10724 bytes
SHA-256: acd8e38d35d00253ff7ef70abdf24a767ef48f6314b01de3ca7a8325125b2a53
font_02_sfnt_off0001316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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