Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc49cfc7a836438b…

MALICIOUS

PDF

68.5 KB Created: 2020-12-20 08:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 451da302dfe5d5d211831e34c59eab23 SHA-1: e8c7755fc2d8bcfecdf9b3f9fc0ca65de2c972c5 SHA-256: bc49cfc7a836438b87bc6efd3d0a70b3a5527023a9b2e6c6f3a7ef01c9a400fc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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, with ClamAV detecting it as a phishing trojan. The primary attack pattern involves a large number of embedded external links, suggesting a link farm or phishing attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=lincoln+vantage+300 PDF link annotation
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/lejoje_guteb.pdfIn PDF document text
    • https://jolezutixuzusav.weebly.com/uploads/1/3/4/6/134605000/jewet.pdfIn PDF document text
    • https://xewidepomizexas.weebly.com/uploads/1/3/0/7/130775014/wufolezetanasusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470232/normal_5fc7dd1ba7fa3.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/kovimivowuxomi-jakuvime-balup-fopeberutopavo.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/5fdcb84616306c7603b6accb/t/5fdd1c6bca73133e58133f2a/1608326254087/bbc_iplayer_radio_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/western_civilizations_19th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/toxupukagafarumitigulak.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/decomposing_fractions_worksheets_4th_grade.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c21c504bb4653ce0bdb8/t/5fcb61e51df7590d80dea96f/1607164390266/gopekezagumunafoduvamok.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/first_solar_series_6_module_data_sheet.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_off0000c9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F3 5000 bytes
SHA-256: 57af5a9757ff182eb259ed26d41ca645dc57d4d0a8dc5c44f86177eb6de8173e
font_01_sfnt_off0000db1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1B 13444 bytes
SHA-256: 2fa5ebb885598b7660c9af9e6a2aa8e6103749f272aca3f402b6d854f68c723c

Open this report in the interactive analyzer, or submit your own file for analysis.