Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb3ac7f90ac3a4c…

MALICIOUS

PDF

88.9 KB Created: 2020-12-04 18:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4e1ceee35e9c40ef3a265092eae8db68 SHA-1: 348669bca36011db50edb388de3ea02222cc7fdb SHA-256: 1bb3ac7f90ac3a4c322838887be99d23b36c638305082a94a860d42e308a718e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as 'Pdf.Phishing.Trojan'. The embedded URLs are the primary indicators of compromise, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=ffxi+nasomi+fishing+leveling+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5fad39bca90ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_5fc132b4d5d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_5faf728856a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8bc0be3a4b8.pdfIn PDF document text
    • https://pudevadiketimim.weebly.com/uploads/1/3/4/6/134606785/1226448b9cadf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ladojenefe/sports_tv_guide_dubai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b408ab-0e9a-4cb9-9bd4-6cd4855009a9/wirosopefewesuxabokazopiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ae101a-a044-424e-a847-b14b183ebad4/75373925759.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d92f11f6a4198485658d/t/5fc427511972c46e3c20980b/1606690641754/97550722578.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/macroscopic_form_of_energy.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 5112 bytes
SHA-256: 627b02a3edaefbb9eabdc26cf783a02411eaebb97f211cc41ce9e10729d2f6bc
font_01_sfnt_off00011161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11161 6068 bytes
SHA-256: 58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717
font_02_sfnt_off00012112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12112 11340 bytes
SHA-256: fc5ffaa82be66b1794e22a755d64d78c0b89c592a7005967ce7ffd664fe07c94
font_03_sfnt_off000147c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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