Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76bd3d500cff8a7…

MALICIOUS

PDF

75.0 KB Created: 2021-02-04 06:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a9b986fd78a885006e82b71b306b82f4 SHA-1: e9947110c414d8d53aa929db3fbefe7cafc096f6 SHA-256: c76bd3d500cff8a7c5fb6b17ba8d93fea6a00db4a205ebcf1d2a452e08105188
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=greensleeves+sheet+music+violin PDF link annotation
    • https://cdn.sqhk.co/zibepidok/ghgeNgf/bapodo.pdfIn PDF document text
    • https://cdn.sqhk.co/besuduxikuvo/tjfjgii/lojijifanuviwapu.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/ggrvhbV/next_business_tycoon.pdfIn PDF document text
    • https://cdn.sqhk.co/rowojazur/iOhiMjd/vexibudabiwivulonamom.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/aif5hib/simcity_buildit_hack_ios_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/cDgjjiR/download_citra_3ds_pro_apk_cracked.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/romirevuxilegiduzem.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/jolozidabi/nofusofejito.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/electric_renewable_energy_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/free_online_invoice_template_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/fatojusoliranowatawu.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/blackberry_pearl_8130_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/subiralanugele.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/53848512052.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/baahubali_4k_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/89617651062.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 4804 bytes
SHA-256: 81406acdc7a2f144401b68ebc143d04c1ffad4ca50637ff74300bdd73a83aa79
font_01_sfnt_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 11380 bytes
SHA-256: 8fbad4360d9904737ee8a09b2bfcb1aee0ecc623cdb1a56d0a47a8f80fd2dce2
font_02_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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