Malicious PDF — malware analysis report

Static analysis result for SHA-256 c632b1aa5b3c8f20…

MALICIOUS

PDF

75.0 KB Created: 2021-03-31 21:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b9c2087d21dbdd0745ce0b0f22c8b9a6 SHA-1: 508a9795b2eef1d26b4394c5f59b53aef2fea876 SHA-256: c632b1aa5b3c8f208da83fa5b38c3cba13f92e5d664eedb08c9525d1977f1e18
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=linear+algebra+5th+edition+by+s.+friedberg PDF link annotation
    • https://guzezetuxavipub.weebly.com/uploads/1/3/4/7/134765233/5468074.pdfIn PDF document text
    • https://fetenove.weebly.com/uploads/1/3/5/3/135330361/tunoxavinapagano.pdfIn PDF document text
    • https://maxokafas.weebly.com/uploads/1/3/1/4/131406275/3257017.pdfIn PDF document text
    • https://piwaxokireruber.weebly.com/uploads/1/3/0/9/130969414/namunezumitase_puvizoke_satikimageva_rogiw.pdfIn PDF document text
    • https://lazofakivew.weebly.com/uploads/1/3/1/4/131406449/pumido_dedewiximuw_zakanitawarib.pdfIn PDF document text
    • https://cdn.sqhk.co/vosevabuv/Gxhf4he/audiovisual_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/rexixugepir/ZpN2gfE/pyrit_rainbow_tables.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gimokoso.epizy.com/zoxamagapogixini.pdfIn PDF document text
    • http://malenezi.epizy.com/hp_laserjet_p2015dn_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/jrcalc_guidelines_hypothermia.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/oil_change_ariens_deluxe_28_sho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354d1d80-58b5-4700-a29c-3bc1b1f45465/how_much_does_a_dachshund_dog_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169590e7-c940-40f1-95d8-21f5a336534d/how_to_prove_creditable_drug_coverage.pdfIn PDF document text
    • http://wanezezigemos.rf.gd/barcode_font_idautomation_code_128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a78a23a-bb9a-4f25-a15a-f23fa2db5a13/sumijogefoniji.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/plantronics_headset_co53_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/bfg_full_movie_free_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/16111790794.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_off0000e691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE691 5508 bytes
SHA-256: 3840128d8fda509f58b249b7e8e45fe514d4c52801735c6928060cc6eec7d27e
font_01_sfnt_off0000f952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF952 11012 bytes
SHA-256: 48125b0b80ef72cb76cd198852af6c073ece0a1207f6acaa31a4a099d1156320

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