Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3119bdc5d298f5…

MALICIOUS

PDF

83.9 KB Created: 2021-01-25 03:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 885829432765234506ad64e8900b0184 SHA-1: e631c37e00eb89ca584f7664c6aada04ac9a2dd3 SHA-256: 1c3119bdc5d298f5b2b412dff15703cd96febd00cf4c27f9d0637d1071a45d13
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 detected as malicious by multiple engines, including ClamAV, and flagged by an ML classifier. It contains a large number of external links, indicating a link farm or phishing attempt. The document body, though heavily obfuscated, suggests a lure related to a 'fashion report'. The presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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://baarspo.ru/123?utm_term=fashion+report+ffxiv+week+64 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5ff667b923347.pdfIn PDF document text
    • http://vemololuwejab.iblogger.org/metal_melting_points.pdfIn PDF document text
    • https://dedopaka.weebly.com/uploads/1/3/4/4/134498192/5927174.pdfIn PDF document text
    • https://lewixukulir.weebly.com/uploads/1/3/1/6/131606807/deafbad2fc57dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370052/normal_5fcef8fc85d94.pdfIn PDF document text
    • http://kimagibasip.22web.org/30397601604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5fdd5fd1ab15c.pdfIn PDF document text
    • https://nitevafatuva.weebly.com/uploads/1/3/4/8/134872456/58c9009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5fd36c62b4186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477379/normal_600116c1c363d.pdfIn PDF document text
    • http://kufemotobenin.66ghz.com/tevenagazobe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gazivemon/windows_10_64_bit_pre_activated.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/12052655166.pdfIn PDF document text
    • http://bezepegu.epizy.com/beremamijabakovazi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 5228 bytes
SHA-256: 229ea64c09d6c3eb11b2b0d1c984b09d501ce928be23180795e8196f4bf9444d
font_01_sfnt_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 11032 bytes
SHA-256: 874142813dba65ec96cf94c1cf9241b6f477221b7fcfbc1007aa043d8f38d4e0
font_02_sfnt_off00011f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F89 16060 bytes
SHA-256: 3a2bb6651a5ad642813d1e324805fe83a688734d44fd23e014c0665a2602df32
font_03_sfnt_off0001341d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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