Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af4488c216e1835…

MALICIOUS

PDF

75.4 KB Created: 2021-03-24 21:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03d43488ecf8fba2ca5252410b297dbd SHA-1: 3f525b7b74ba8a31f4bdc93a47908002e21978fb SHA-256: 2af4488c216e1835322e0aa8bc1ee299eda1aa8af0b2df1e04342628c6e4ed51
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or malware distribution, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document likely designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=toys+r+us+baby+safety+gates PDF link annotation
    • http://save50.pro/23147499658rwray.pdfIn PDF document text
    • http://edarudost.online/army_ccir_reportd4bxr.pdfIn PDF document text
    • http://money-team.site/yamaha_115_outboard_manualjbum2.pdfIn PDF document text
    • http://requiremcgood.com/mofenegakerikofipez9vhh2.pdfIn PDF document text
    • http://ovca.space/foposesa0vrbx.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/how_to_tune_a_cobra_29_ltd_classiczpu1c.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/4cce6e100.pdfIn PDF document text
    • http://karaulovlife.site/wovezapevuduxevek6cm2t.pdfIn PDF document text
    • http://presente-top.store/china_vpn_unlimited_apkwmkhm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464700/normal_5fe2ab5068980.pdfIn PDF document text
    • http://bristol-yalta.run/asymmetric_encryption_information_systemhgeu8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5fce28e116557.pdfIn PDF document text
    • http://kyponnik.online/aplicativo_de_musica_offline_android2kkbh.pdfIn PDF document text
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/rusijif_zadidaxa_lejobefavitetav.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/fosagoba/vmware_esxi_update.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/masterbuilt_electric_smoker_1500_watt_lowes.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/kovavub.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/all_time_favourite_bollywood_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/national_competency_based_teacher_standards_deped.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/7958035183.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/infantile_spasms_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/72272592785.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_off0000e78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 5092 bytes
SHA-256: b8db3ce4d46a9dbd9604051b8ffa2c16dd137d97d1c5aa018d8744d1277e4d92
font_01_sfnt_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 11100 bytes
SHA-256: 28e1b8f56eb3da618129e52f1be3254eb3dadd40dc9a1eb343f82d82dfd8c8fc

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