Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad9b5f8c655277c…

MALICIOUS

PDF

71.4 KB Created: 2021-04-20 10:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9f7d9a088ffd457f55fbb244b7c5cb8e SHA-1: 21b6247a0f71db4af3441d6f7a94292a3bed14fc SHA-256: 8ad9b5f8c655277ce6f894329257897fe35a1001394537028c69a767fafc46d3
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a social engineering attack designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=louise+hay+meditation+self+love PDF link annotation
    • http://shop-onlain.fun/how_to_use_lg_fuzzy_logic_washing_machinej6cv0.pdfIn PDF document text
    • http://xemopubuga.iblogger.org/29290091701.pdfIn PDF document text
    • http://meetchambre.xyz/fefafekonepigorekalutawojlthon.pdfIn PDF document text
    • http://sentytld.online/asus_mx279h_price_in_pakistanv47oc.pdfIn PDF document text
    • http://edevletorg.com/fuentes_del_derecho_mercantilqfdyz.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/wurivuve/brazil_serie_b_stats_and_form.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_4c1b6f846613426d90f43a3aaa2e4d8c.pdf?index=trueIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_c6da9dd0986840449a691b640394332c.pdf?index=trueIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_c1a7404f38af4cc7a498deff6ee9d952.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divikufifir/90980784376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb666f8-8338-40a7-a0b4-0b4ef8eb642d/honda_harmony_1011_transmission_parts.pdfIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_30b299c0561245ab83a17c5ab187005d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/766fbe5a-44ea-4133-b908-7f060f09dc85/christmas_songs_fake_book.pdfIn PDF document text
    • http://tapalexajud.epizy.com/82073480364.pdfIn PDF document text
    • http://xabulupemoze.rf.gd/breather_in_transformer.pdfIn PDF document text
    • http://fofilelajisemap.rf.gd/gavujajenov.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/16802018011.pdfIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_ea8a942730f04b15a5f70e70ee4324d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/toefl_question_papers_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/kugilariletelu.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/dewalt_dw1361_titanium_pilot_point_drill_bit_set.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/10759275074.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/how_to_smoke_with_the_char_griller.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_off0000daed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAED 5152 bytes
SHA-256: c0e73d97afbd5b74d84f193bab96ff084b4a97d99516d4d68faa9cd8b8c1b056
font_01_sfnt_off0000ec67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC67 10028 bytes
SHA-256: 3d66ee8aa7f411fba242d30ccb9b611ef94287dd3b1dc11afa8e2c71aa9dd44c

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