Malicious PDF — malware analysis report

Static analysis result for SHA-256 6068f48032e1c3d5…

MALICIOUS

PDF

102.9 KB Created: 2021-02-21 09:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e529cb2ff0b01183d5731ddcd0f1f5e7 SHA-1: c3bc9dee989d605413de5e9260d382d3a99ace09 SHA-256: 6068f48032e1c3d5fc605e60c23e6f802254bc368b023f4da19cad0aab7b6cce
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=hp+elitedesk+800+g1+sff+power+adapter PDF link annotation
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/f5d95f8.pdfIn PDF document text
    • http://maslovauto.ru/22623376820g6lpy.pdfIn PDF document text
    • https://xunedoworevesa.weebly.com/uploads/1/3/1/1/131164322/tupatidejafixe.pdfIn PDF document text
    • http://onlinetiser.website/95805251802wsgfm.pdfIn PDF document text
    • http://opticsystem.website/wevuxifoj7abx.pdfIn PDF document text
    • http://epipog.com/domupipabevixe37iuj.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/xoferuzu/autism_spectrum_disorder_dsm_5_criteria.pdfIn PDF document text
    • http://roworozirad.epizy.com/zikajopesefezozutovap.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/present_simple_forming_questions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/fopade.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/dalaran_heist_warrior_guide.pdfIn PDF document text
    • http://nedilopasosugop.epizy.com/list_of_star_wars_races.pdfIn PDF document text
    • http://petifogowiga.epizy.com/gidemigotox.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_off00012c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C53 5396 bytes
SHA-256: acb1ddee4415c4e4eb5c4d260dd3303d95d223989e2af757d3bc425df3dffccb
font_01_sfnt_off00013ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED6 15072 bytes
SHA-256: cf5fef6532ecc441b300be53ce3a18673b496a21f4320235bca0e586079ef490
font_02_sfnt_off00016933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16933 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c
font_03_sfnt_off00017e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E2F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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