Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbca6260e3ed41b2…

MALICIOUS

PDF

69.4 KB Created: 2020-12-06 11:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0fd30fe5323611bb03c6cd529c1d86d7 SHA-1: 1bfb49143ba843019bf685e8159a2b57e65529c5 SHA-256: bbca6260e3ed41b2d72d083ab4c8b67a4c2c410863ed1fa639dac511707ae8ce
214 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including a critical finding of it linking to known malicious redirector infrastructure and a large PDF link farm. The embedded URLs suggest an attempt to manipulate search engine results or redirect users to malicious content. While no scripts were explicitly extracted, the presence of PDF-specific malicious indicators and the nature of the links point towards a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://cctraff.ru/123?utm_term=what+is+a+macromolecule+in+biology In PDF document text
    • https://xesilowavexaweg.weebly.com/uploads/1/3/4/2/134265648/1334814.pdfIn PDF document text
    • https://wenezobu.weebly.com/uploads/1/3/4/6/134625155/1720325.pdfIn PDF document text
    • https://detasove.weebly.com/uploads/1/3/4/5/134594091/bomaja-vafijidik-nenuzejevamora-gixafatep.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/4edfc2244f3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc783a843c5ee75bf2ca75b/t/5fc9d0fcec1d586fb38df869/1607061756908/34739899275.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe23679b1ed03538a3e694/1606296425466/pixumulajixuwododexina.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e727ea4a794d5645064f/t/5fc0fa3a145a8629dcd3e138/1606482490985/summoners_war_cheats_no_survey_or_verification.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54e01085bf90c0e1a4b0c/t/5fcb730a1df7590d80dfa834/1607168779924/jumbline_2_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71f15eddbb05c68937f14/t/5fcb86c4551bdc47e7a9cfa3/1607173843847/80761323901.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eac55bcb0228a2828fa5/t/5fc12fcd9d79364840b8352b/1606496206632/67053726622.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe14b0e6d49a06bb5938b6/1606292658746/15478662231.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54128c89e1c4b8fdb43cb/t/5fc8dfbe8bd77935675be3f4/1607000001069/38227599717.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e627116eb00e3c4beed8/t/5fc3ab39145a8629dc20dc0f/1606658873934/21558462652.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a94381fec00968438b4e/t/5fcaf7f585bc3a28a601c929/1607137271854/meridian_157_chapter_1_walkthrough.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2061af5bf52c32660e1/1606218247960/house_of_faun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcff31b474932ca267fa99/1606221623963/chapter_two_cells_tissues_and_integument_overview_of_cell_and_cell_membrane_answers.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_off0000d2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D6 5468 bytes
SHA-256: b339ee00c95c396aaee2c45231de26c347ffa5c90ce0a908d2dbdb2fec8d5e41
font_01_sfnt_off0000e557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 10348 bytes
SHA-256: 8d2cc41d5470e5062e9ae2e0a2563bad6ab79cedb81e5e8798aa9c03b4c1dbcf

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