Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cd3e8917869f30…

MALICIOUS

PDF

77.6 KB Created: 2021-03-03 15:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ebf2fc431aa74bac7556645e7fe41db4 SHA-1: 95075f6f1d7041622689ae0dde05a65fdaeda108 SHA-256: 06cd3e8917869f303d04f7f096c3271b677a305b8205c490ffab56451be3c1bf
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 link farms or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful websites, possibly for credential harvesting or further malware delivery.

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://botokaw.ru/wix?keyword=factors+affecting+climate+change+worksheet PDF link annotation
    • https://cdn.sqhk.co/zokonerozo/hdhfVpF/followership_and_leadership_essay.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/tusodorazo.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/how_to_fix_gas_stove_not_lighting.pdfIn PDF document text
    • https://cdn.sqhk.co/kolazapikib/bhj6igM/89282886405.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/zilivigivimemo.pdfIn PDF document text
    • https://xapebetilozeze.weebly.com/uploads/1/3/0/8/130873864/784fb9e5a4859b.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/jbhjji9/sudoku_blank_printable.pdfIn PDF document text
    • http://terugate.mypressonline.com/why_would_my_check_engine_light_be_flashing.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/njdot_pay_item_catalog.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/2c45a0e8f.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/sazariwapa/fefukivitiduri.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/74673488099.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/50681500136.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/letter_of_intent_construction_contract_template.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/medicare_australia_2_way_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/biworebunilikusadewekadu.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/urine_biochemical_test.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/how_do_i_reprogram_my_autostart_remote_starter.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_off0000e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DA 5192 bytes
SHA-256: f78b698e4c6a8c293cb954945fad35585a1ca2f8f7a5ecfc447d654ed23199ee
font_01_sfnt_off0000f864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF864 10204 bytes
SHA-256: 53e48c2c9fe8debfdecdf7a0080dc6165545bda908652fc14a091894b9c089ff
font_02_sfnt_off00011b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B42 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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