Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eca42e60abd446c…

MALICIOUS

PDF

80.3 KB Created: 2021-03-17 17:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2bb18c8a2d574ace04dcbd08532f477b SHA-1: b83ddd6671b77e87d7caa7bb784a7eb79e3481c7 SHA-256: 3eca42e60abd446c302640e1def03f6eb39887da22c6db53c9e9f137c926761c
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=what+is+department+of+corrections+system PDF link annotation
    • https://cdn.sqhk.co/jevamivuvugi/XJhgHOE/big_truck_for_sale_in_ga.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/jNHxgdn/9313507493.pdfIn PDF document text
    • http://wobepatonogez.iblogger.org/louisiana_purchase_1803_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/tikugubobo/jgbgfge/react_native_animated_android_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/eifaNkq/noruniji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_dd4614d30786498bbdee027fdd8a8d85.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a21db73-2d9b-4fe9-b3fa-ad6af6037b6b/how_to_install_honeywell_wifi_thermostat_rth6580wf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b38a5c3-fda3-4565-b2ed-24c08fc0ef47/99689366803.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/wusabafolizegajaseje.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/best_face_sheet_masks_for_sensitive_skin.pdfIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_20196b9bf299476d8625d955c8b606c2.pdf?index=trueIn PDF document text
    • http://repazof.rf.gd/tunupedopa.pdfIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_0057cece04fe41149b4c9306a1601120.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jawusawar/kuk_university_date_sheet_ba_4th_sem.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/xbox_one_controller_battery_pack_not_charging.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_6039ca6ea70f4109857dc6681001b693.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/chosen_camporee_theme_song_sheet_music.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_bead907616334fe6a2047a2895035105.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/14fc73c1-67d1-47d2-a771-6aaa950c9606/tcp_ip_stack_reset.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_261412bf6dc6487d9b3987a76836d9fd.pdf?index=trueIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_3389979e24a043faa5a69e44a95d80a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0851e4-6797-4ad4-b95a-981031ff3bb2/57_woodworking_plans_free_download.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_e5059f0b208b4bd0b6b359d31d9e23eb.pdf?index=trueIn 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_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 5480 bytes
SHA-256: b270281e9989c621ebc2564fbf3a31cd836792948dea461ce3ea616b1aa2f13e
font_01_sfnt_off000109c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 12216 bytes
SHA-256: dcf412136c22b9edb8b52407ad724a7126965dbe638f70a8753df03e7f1f1116

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