Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4606ecb904cc0a…

MALICIOUS

PDF

79.0 KB Created: 2021-02-08 10:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8135c08586b52f30365f3a9406070c01 SHA-1: bf3bed2f8095689bb1be012177dacb7b1a9ddd08 SHA-256: db4606ecb904cc0a277c831833f3346a4a92d7b7e257714907a73d4cfbfe5ebe
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing lure. The presence of embedded URLs further supports the attack pattern of directing users to external, potentially harmful, resources.

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://bologen.ru/aws?utm_term=adverse+reaction+reporting+tga PDF link annotation
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/gakogoxot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_6011a84f6eac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500447/normal_5fd1ed276235e.pdfIn PDF document text
    • http://azakalaza3.xyz/garmin_nuvi_2595_manual_downloaddszwl.pdfIn PDF document text
    • https://nonesuwenuvav.weebly.com/uploads/1/3/4/4/134400251/tomuwexatomum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_600f745b14cf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimogotewebi.epizy.com/equilibrium_crash_course_chemistry_28_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/29001834877.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/feral_tank_guide_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/badli_badli_lage_video_song_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/definition_of_industrial_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/23042677167.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_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 5260 bytes
SHA-256: d050cbb5af2d1e78383eb00b889a5306dc7438a327b1ad24bcbe4ab1d7075aab
font_01_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 10412 bytes
SHA-256: b4504b2da12221f9ab5af72b13518cc0855f5c177a91883eadf60493cb9aef1e

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