Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3b6263735624c1…

MALICIOUS

PDF

80.2 KB Created: 2021-03-11 10:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7dcf33a72a2046621b28c18780eb7556 SHA-1: df462c52f9de6b23656b04288fa0aa41c1555a00 SHA-256: 1b3b6263735624c1c04b3b93dccedcd54e6cc07b2fdda9e936e134fd33aa67f7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which are on disposable hosting, suggesting a link farm or phishing attempt. One of the embedded URLs, https://jottigo.ru/strik?utm_term=classic+ford+mustang+for+sale+las+vegas, is particularly suspicious. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=classic+ford+mustang+for+sale+las+vegas PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_68c7f6081b0f472da777806cf081a843.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61a8fe4-b549-4031-80db-9682559ac09d/hp_compaq_presario_cq57_display_drivers_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a0f16a-33dc-4881-8a4f-293daef446f8/605579292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba2f5aa-3bec-4f95-907c-f44c1e1ee733/what_is_an_average_score_for_an_emotional_intelligence_test.pdfIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_36bd37cb61234cf19f03c7d9e1cd7e1e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91c2eee-613b-4cf4-9733-459e404cd591/vabatafida.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/what_to_do_with_seeded_bud.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_4130fead780c4f26aaf35189255697c2.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_6840e9eecf8f4a0bade410158e6b0daf.pdf?index=trueIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_c0538a94524f483da8f9d5c67ad8017e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firudegix/prudential_plc_annual_report.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_a35324f7c5b64c75a52e5e1ea9e76190.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jijumupade/planimetria_catastale_non_conforme.pdfIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_d5b42b966ad2470584be3f43a2311341.pdf?index=trueIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_8ceb44af50bc4ee0af28ebe7fce3936e.pdf?index=trueIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_f863cfd56d5d490ba3d441087675a111.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_afa76e9f7771446a849928e69f85a3cc.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_06286635238949bba0aeb73d91176120.pdf?index=trueIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_d8ed5e67b8504cc180d4d94302a7e4cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42aabc12-67ac-402a-876b-85c871a6ef34/garmin_vivosmart_4_oder_fitbit_inspire_hr.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_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 5304 bytes
SHA-256: f3090764948ceeb2bc93c9a6f2b171bdf456595e57562ded83252aa26cc79521
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 11796 bytes
SHA-256: a95e19a180b5020ac6ab203c44d5322ace4111cade553fca7b4e7f7a2180a643

Open this report in the interactive analyzer, or submit your own file for analysis.