Malicious PDF — malware analysis report

Static analysis result for SHA-256 914896cdb3720b53…

MALICIOUS

PDF

90.5 KB Created: 2021-01-16 13:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d566c486227a28bd8f4243cd89cef46c SHA-1: 352ad3ace5faaaa0f9ebf4d2519614a691680c66 SHA-256: 914896cdb3720b536ff524096a228d76a50d580be43113c8a4910911ddf38a5f
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with heuristics indicating a malicious redirector and a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the presence of malicious URLs and the PDF structure point towards an attempt to redirect users to 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
  • 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://traffking.ru/aws?utm_term=work+song+cannonball+adderley+pdf In PDF document text
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/e22bc.pdfIn PDF document text
    • https://site-1177263.mozfiles.com/files/1177263/zombies_2_characters_real_names.pdfIn PDF document text
    • https://site-1174026.mozfiles.com/files/1174026/paxopabeguwunomu.pdfIn PDF document text
    • https://site-1181017.mozfiles.com/files/1181017/electric_guitar_sounds_tinny.pdfIn PDF document text
    • https://nigafabap.weebly.com/uploads/1/3/4/3/134377596/dadogul.pdfIn PDF document text
    • https://loxojewumiv.weebly.com/uploads/1/3/4/6/134651611/2f46879feb897f.pdfIn PDF document text
    • https://site-1205690.mozfiles.com/files/1205690/types_of_sorting_algorithms_in_c.pdfIn PDF document text
    • https://devejibotabakap.weebly.com/uploads/1/3/4/7/134702496/2dc62aeabf9.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/tuwegikog_xukal_paboli_befamaleb.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/figidireki/bubble_shooter_sea_saga.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/bsc_first_year_physics_practical_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/les_tubes_d_analyses_biologiques.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/forecast_accuracy_report_template.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_off0001244e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244E 5644 bytes
SHA-256: 66d7881d52085f44515994d418a3f740d7ee88c144b9c55b5e6317ab4f47afc6
font_01_sfnt_off000137a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A9 10972 bytes
SHA-256: 7ae0f053e58ea8cc5c8ffab0bc1ff67e4552cfa4f8193928ad98c41041d028f5

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