Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1a76a3ae67c32e…

MALICIOUS

PDF

70.7 KB Created: 2021-05-09 06:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a7b367ed41759fa74f8617f144001267 SHA-1: b14db20651992f3cf3ad5b1be2a78e18d617ac01 SHA-256: 1e1a76a3ae67c32e686772c1c9a7096f4d21e982bf4affa98ae8297754a4ebd9
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to checking 'dojo points', likely a lure to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/strik?utm_term=how+to+check+dojo+points PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5fc99ad97ad85.pdfIn PDF document text
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/bokituzabuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_6044cfb71130f.pdfIn PDF document text
    • https://newimogo.weebly.com/uploads/1/3/1/0/131070302/475949.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471481/normal_5ff904fef3fa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_603b1ee34b6ca.pdfIn PDF document text
    • https://xadifopelizil.weebly.com/uploads/1/3/4/7/134771643/1814719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417830/normal_5ff405f7cd0e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487641/normal_6018ccbc682c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fee3faa8bfba.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/5fcc5df2-c138-421d-ad4c-c2b5b487175c/liwanenadidegiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e2675b-36c1-47ec-94ed-d0dfc7d1d59b/52614889216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc575733-47d7-40a6-acdd-b1d5793ccd28/53146048318.pdfIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_58333f51d1ba4e56ab2b749fa9a89f24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9baf9cc6-8601-4ad0-90e1-4a6c6d329948/a_thousand_splendid_suns_characters_list.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_97ecbc631f6545aaa9b066924343547b.pdf?index=trueIn 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_off0000d758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD758 5016 bytes
SHA-256: e15a2a7c2264abfca71798e96cf9e0b60cafae3e7c5bb5b66e49f05b27d66f6d
font_01_sfnt_off0000e87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87F 10520 bytes
SHA-256: 7661da657c33173cc2fa28f0c18664371c7e6985e092db18ba7f50a77c6c7ae1

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