Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a6e3393b84320c…

MALICIOUS

PDF

85.0 KB Created: 2021-05-14 19:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 27e66927b809fc7826f2d5c7bd324dec SHA-1: b0d0ada3aff56d360fe91ab9583e15aafcfc1f94 SHA-256: 02a6e3393b84320c478d851f43f236d29502e193b9771b986363d3287b9b12c0
136 Risk Score

Malware Insights

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

The PDF document contains a lure referencing a 'Lawn-boy service manual' and includes a high-confidence heuristic firing for a redirector link. This link, https://bologen.ru/strik?utm_term=lawn-boy+service+manual+1950-88+complete, is likely used for phishing or to download a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/strik?utm_term=lawn-boy+service+manual+1950-88+complete PDF link annotation
    • https://cdn.sqhk.co/jefadata/chSgjWk/twist_of_fate_season_2_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/jrRchcI/mit_emba_application_process.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/ynSjgjd/nitro_pro_to_word_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/tjiWjiL/17748620347.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/qHja2id/vesafeletidemor.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/OJghhcX/tefitavez.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/NhchhtR/42820063768.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/monitor_cardaco_polar_a300.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/7jd5hdu/td_auto_finance_late_payment_policy.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/1tg5Xif/mewatif.pdfIn PDF document text
    • http://tasigezagu.scienceontheweb.net/gidusozadojogufatamuxamib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db37014-9513-4cd1-9ca1-19c1eb93c32c/zelaluduverozedanav.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/11932472298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ec1965-1187-4656-b12b-6873698529bb/swiffer_wet_jet_refills_costco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245ad9e0-6638-4006-b73e-d5a676696074/vuxiledugupedoruzunepu.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/alone_heart_sheet_music_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ec4632-c854-4a65-859d-3e575c1d9b76/cbt_activities_for_social_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/81555651823.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/asiago_cheese_nutrition_information.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 6112 bytes
SHA-256: 400a008d7bbeed2c5c45c99c235965f7264c7d9fe803e52b49f2fc00a97d8049
font_01_sfnt_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 11492 bytes
SHA-256: d9e2efab1b9ea3e8d883b5cc050bf35c38c906e0d2b92a96081ca090d60c87c0
font_02_sfnt_off000130ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 16232 bytes
SHA-256: c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921