Malicious PDF — malware analysis report

Static analysis result for SHA-256 be246d2aeff405d7…

MALICIOUS

PDF

67.4 KB Created: 2020-11-30 04:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 08ab8f2d8c820895776cb6199b298e48 SHA-1: f2cd3da6ac701300f30b047ca0eb792c23230723 SHA-256: be246d2aeff405d70379d13bf153fc7e2376a3a5dd66c534e0df360b7d36476a
214 Risk Score

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=oriental+longhair+cat+price In PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/f045a886.pdfIn PDF document text
    • https://xezujexowesujol.weebly.com/uploads/1/3/4/5/134502134/51d61d905f142.pdfIn PDF document text
    • https://jugizefabugej.weebly.com/uploads/1/3/4/3/134377355/xojoxuzeti.pdfIn PDF document text
    • https://tazifidaron.weebly.com/uploads/1/3/4/9/134901468/76a41a19edb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/senodiw/32254751096.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/bazaar_kannada_movie_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/adding_and_subtracting_integers_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/vomumikezosir.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/98821586204.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/project_x_6.0_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/wind_erosion_control_measures.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/answer_the_public_free_version.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_off0000ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDD 5044 bytes
SHA-256: bf81f554ecc0e1d47667d40b5ea3bd1c13b92b6075beade77e285ed95f96d4e5
font_01_sfnt_off0000ddfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFC 10164 bytes
SHA-256: 9f305283db332221cb56c2ea4f5466342d4e7b3f8f2e80bcc07d093d3ece3b11

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