Malicious PDF — malware analysis report

Static analysis result for SHA-256 da97729fe0d6a41d…

MALICIOUS

PDF

82.7 KB Created: 2021-03-04 17:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 47060c842443041eaf6fb9a569f93ede SHA-1: 28c42b1a267a59108fc6f13e6d03447a45b0c14a SHA-256: da97729fe0d6a41d27092232eae3d1aaf6d665968095fdec44b5362617580b63
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains an embedded URI pointing to 'baarspo.ru', which is likely used to redirect the user to a malicious site. The presence of numerous external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggests an attempt to create a link farm or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=live+my+life+lyrics+marc+anthony PDF link annotation
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/1de6b9.pdfIn PDF document text
    • https://rezigetofetima.weebly.com/uploads/1/3/1/1/131163738/favakapitikuno-dinip.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/47d31e18.pdfIn PDF document text
    • https://kizatoruzosij.weebly.com/uploads/1/3/0/9/130969146/kazufobik.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/radubozufiwo/chogada_tara_violin_dance.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/pudigufo.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/17763799001.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/magoris.pdfIn PDF document text
    • http://jojixeme.rf.gd/american_gods_season_3_episode_2_release_date_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/concept_map_template_nursing_blank.pdfIn PDF document text
    • http://dazotetitow.epizy.com/58010501885.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/62924878677.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/b_tech_malayalam_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/avast_free_antivirus_license_key_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/49861205857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc03f868-4e5c-49f1-ba0d-17c404fde2e3/wolf_of_wall_street_margot_robbie_nursery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffaa064-db7f-4e62-9892-43425f317280/football_player_training_programme.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/battlefield_bad_company_2_apk_data_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/nasumubatugibusajurapi.pdfIn PDF document text
    • http://rogofijanititad.epizy.com/cefsharp_winforms_c.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_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 5012 bytes
SHA-256: 7bf5ac8cd8da1c808c16c64d8ac59ba8236e9506c8cb97a84e5cdc1fb475054b
font_01_sfnt_off000108dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DD 11292 bytes
SHA-256: ac07b93868327f550f725c703b62c1135f819612c23bdcb888996d2df2fb59c7
font_02_sfnt_off00012f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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