Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c85970c82f018e1…

MALICIOUS

PDF

80.5 KB Created: 2021-01-17 21:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 19c38a08aea428d3f147ba093b398fa8 SHA-1: 73810c10debd75a4837bc18a3693156d88f9ca84 SHA-256: 8c85970c82f018e1c37585eeda02cf086a16fe4cdd6f0c14436e31ca3878a832
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=catching+fire+book+pages'. The ML classifier also flagged this PDF with high confidence. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=catching+fire+book+pages In PDF document text
    • http://jitokinut.iblogger.org/56887204745.pdfIn PDF document text
    • https://site-1177275.mozfiles.com/files/1177275/carnival_cruise_careers_work_from_home.pdfIn PDF document text
    • https://site-1172290.mozfiles.com/files/1172290/49330793670.pdfIn PDF document text
    • https://site-1194102.mozfiles.com/files/1194102/felilurorojekajatotem.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/first_4_words_of_the_declaration_of_independence.pdfIn PDF document text
    • https://site-1168287.mozfiles.com/files/1168287/12927385189.pdfIn PDF document text
    • https://site-1173403.mozfiles.com/files/1173403/tuvepijex.pdfIn PDF document text
    • https://site-1250005.mozfiles.com/files/1250005/ealing_abbey_report.pdfIn PDF document text
    • https://site-1177942.mozfiles.com/files/1177942/lilijiniruruxowebutevun.pdfIn PDF document text
    • https://site-1192787.mozfiles.com/files/1192787/rusovuweferi.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/megulu/jimopajezisefeguv.pdfIn PDF document text
    • http://bumufemukelogik.epizy.com/42460593151.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/46058186787.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/kalutile.pdfIn PDF document text
    • http://vetarobafawuk.epizy.com/zoxexuka.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/5510713763.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/vojuvabifogulijizufe.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/hampton_bay_ac-_552_ceiling_fan_manual.pdfIn PDF document text
    • http://ruzoguniwu.epizy.com/69486298448.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/6640569783.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_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 5352 bytes
SHA-256: da91745e77de83a2a9897fd34dd8ae82d3a0ad126f88b6de8ca35f63b58e3168
font_01_sfnt_off00010fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEF 10876 bytes
SHA-256: b61a8b6a6719742e56f7f23617c27a30406d6b57344c321f52c11f4ab193539e

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