Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4790073e03ce887…

MALICIOUS

PDF

70.9 KB Created: 2021-03-17 14:17:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d5a2ecebc5a3122a97679eec5789cf02 SHA-1: 00c1c1ba67c589ef359663d4002ff77965c0c81d SHA-256: c4790073e03ce887cfe7d3e52adabb998b36a3493e31a4f05ff3932bef6ade13
156 Risk Score

Malware Insights

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

The PDF file contains numerous 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, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=fe+electrical+and+computer+review+manual+ebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406223/normal_6030f6c12b2e6.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/dhhifge/zombie_tower_defense_games_android.pdfIn PDF document text
    • https://ratesikumetu.weebly.com/uploads/1/3/1/1/131163578/842331.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/eGji4ia/inside_the_box_tampa.pdfIn PDF document text
    • https://povuwifapijolak.weebly.com/uploads/1/3/4/2/134265363/1561747.pdfIn PDF document text
    • https://cdn.sqhk.co/foxenikap/haNdjah/81429818336.pdfIn PDF document text
    • http://ogranicbio.fun/photoshop_cc_2019_tutorial_for_beginnersvyl3q.pdfIn PDF document text
    • http://trynutra.shop/82405290934q8y6g.pdfIn PDF document text
    • https://sukodijam.weebly.com/uploads/1/3/4/5/134516983/1337251.pdfIn PDF document text
    • https://mifokidosunatav.weebly.com/uploads/1/3/0/9/130969664/penoxedazabakineg.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/dhiJWgi/61010850676.pdfIn PDF document text
    • http://trenolgia.buzz/gokalegiwefi84xc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468812/normal_6005b555d3dcc.pdfIn PDF document text
    • https://guleritep.weebly.com/uploads/1/3/1/3/131383493/wunuv.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/cIdjL60/dhoom_2_full_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_6018a7b271be7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409409/normal_5fe5e429aad1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/jasperreports_functions_maven.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/fudikuzitomekasogu.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/89743306897.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/buroximubaruz.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/database_systems_the_complete_book_solutions_for_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/25620202800.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/zorogolozuverunuwazotisa.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_off0000d86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86A 5352 bytes
SHA-256: f048a2f60fe5aea784ac0305c4752bc64249a51e757b28033209d0d02502b937
font_01_sfnt_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 10108 bytes
SHA-256: 21b387259e06fbc031fcde4d3ef80c9227b89a53278bcbfedf9cbb74bab718dd

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