Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac59a397e12c267…

MALICIOUS

PDF

59.2 KB Created: 2021-01-07 00:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2c3dcec3b69ac7804857fed99d6f58cd SHA-1: 733fab8558bca1c160d4d221cd1627fa3c77c5a6 SHA-256: cac59a397e12c267730ba8d94d47880df4088cb1459e1473d880c6577769b472
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with the primary one directing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/123?utm_term=group+2+periodic+table+bbc+bitesize In PDF document text
    • https://buserakufazuwus.weebly.com/uploads/1/3/4/0/134097478/rosebopodagom-dobiwoser-pudukipemusiros.pdfIn PDF document text
    • https://bigakobavivab.weebly.com/uploads/1/3/4/7/134747120/rovejowavubumu.pdfIn PDF document text
    • https://piteselijofer.weebly.com/uploads/1/3/4/6/134608400/pavozorok-wuremoziju-temusevurubojor-lasikovekujupit.pdfIn PDF document text
    • https://zitewamim.weebly.com/uploads/1/3/1/4/131454986/8737621.pdfIn PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/xizefewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5fd8254a50d78.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/96dd6d16-94ea-4c4a-9209-16eb3545a9b8/wet_and_wild_hawaii_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793af73f-b2b5-4190-a967-a8496df52d7e/baduwuxubos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8be560-807e-4665-b48e-b0abd9611b1a/picowords_answers_level_29.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad28a832-09fc-4fc6-9300-55cbaab5daee/dodup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0146a96e-6f4c-4eec-bb82-03f043ccb2cf/gukafirapile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ee1328-89a5-446b-9dd6-1040752e5bdf/remington_700_for_sale_pa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF81 5420 bytes
SHA-256: da8b5f363d5fc9852e51e2cd3073cf7d271002d303dae50dd3abdac5d74d67a3
font_01_sfnt_off0000c1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FF 8860 bytes
SHA-256: 7d9d666ca417f302488ff4ebc99dee0b7da443a582c06be5ba4c7b60aa014d02

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