Malicious PDF — malware analysis report

Static analysis result for SHA-256 525ccb060add0f2f…

MALICIOUS

PDF

68.2 KB Created: 2020-12-20 10:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 47d2b7139ddfe63341eb85ca825a9cab SHA-1: b0592be61b815901c0d1ac45a1026ee717e9be5a SHA-256: 525ccb060add0f2f15eb15f8070713e87681e95a8c650a7bbceacc0915aebe4c
96 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 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 4

  • 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://trafficel.ru/123?utm_term=i+went+to+the+woods+because+i+wished+to+live+deliberately+analysis PDF link annotation
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/7d59a24e3.pdfIn PDF document text
    • https://kafefibamivo.weebly.com/uploads/1/3/4/8/134891061/kelukolafabijo-kobodedi-mireso.pdfIn PDF document text
    • https://lizotolagodega.weebly.com/uploads/1/3/4/4/134495854/buriwowukosukagogo.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/ac2b567e8.pdfIn PDF document text
    • https://pekireraseg.weebly.com/uploads/1/3/4/7/134720831/mikaxemu.pdfIn PDF document text
    • https://wajativakol.weebly.com/uploads/1/3/4/7/134749030/kepimazo.pdfIn PDF document text
    • https://vureduvo.weebly.com/uploads/1/3/4/5/134513064/323864.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/3d34d7d7-c8f3-40a2-a261-263de06d246b/adiemus_karl_jenkins_song_of_tears_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8301ee8-316f-4669-b2c3-062cb7627dd3/kovazufetuwe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcffea8bc8713fe6fe2ea0/1606221803922/vajude.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/bestanden_samenvoegen_tot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a13fdd46-dcf8-40b6-a047-47e98a538691/31316520650.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/89484401472.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/nasaguz.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/xuxowur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f9eae8-0430-4352-aec2-292e992b89fe/motorola_mag_one_bpr40_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/velorirekunuzemagu.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_off0000cf97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 5356 bytes
SHA-256: fb3a4329be4c0ed029124305b7f23ef87fe8662b112ba630d2661086633d6200
font_01_sfnt_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 9648 bytes
SHA-256: 8b83cc98f1c08b4c9d971e10f9d5d153f7bddfbaf269685cf5b6dc7cad158d7e

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