Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41ac2ba48421474…

MALICIOUS

PDF

60.8 KB Created: 2020-11-14 04:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e9ba8953bb657e99cd715ca6e0dcec07 SHA-1: b6f23b108693c86efd91a0e699b544c07073a749 SHA-256: b41ac2ba48421474812feab1d21334e87b2897962d76082e2a6fc5d2abbbdbed
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The embedded URL 'https://traffset.ru/123?utm_term=are+you+ready+for+precalculus+summer+packet' is particularly suspicious and likely leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffset.ru/123?utm_term=are+you+ready+for+precalculus+summer+packet PDF link annotation
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/77c7cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486353/normal_5fab3f82e8a89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5fa58bbaa6689.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/3278112.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/ed48c8c0-6d79-48a9-9d5c-82467492c552/lanzadera_de_malato.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/roblox_robux_codes_from_youtubers.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/htc_desire_626_bootloader_unlock_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/engineering_drawing_n2_past_papers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38ee0e4-f92d-4623-99b9-ba89748cfa52/22873203891.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/theme_of_the_most_dangerous_game_book.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/xuwutenaxowasizosu.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_off0000b1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A0 5456 bytes
SHA-256: 6aac12c882cb71bfeca1199584fd297118b4ac8ba5285f839c5824b6ee02613b
font_01_sfnt_off0000c428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC428 10048 bytes
SHA-256: d3ba190fc609ad373431db5d5ea7bbd2ca696ad7e22b63d0096b9ceca3d3c9f7

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