Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b5825b03509d59…

MALICIOUS

PDF

79.7 KB Created: 2021-05-28 13:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cabb306e92606a89aebe97c93b702d8 SHA-1: d1b5736e89e7ddccc77ee8d8525fa0b9d8e30155 SHA-256: 49b5825b03509d5977096719a27ff897964fef168121fdefc1c3a889479c8321
156 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that point to external websites, including one that appears to be a search result for 'john deere x304 attachments'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or a phishing attempt. ClamAV detection and ML classification further support its malicious nature. No scripts were extracted, but the presence of numerous external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wb?keyword=john%20deere%20x304%20attachments
    • https://wojatobarub.weebly.com/uploads/1/3/4/6/134612389/5d2ec5.pdf
    • https://cdn-cms.f-static.net/uploads/4477408/normal_5fd7ecbd38a16.pdf
    • https://cdn-cms.f-static.net/uploads/4493550/normal_601d4e845fda9.pdf
    • https://jogelobob.weebly.com/uploads/1/3/5/9/135961552/gobaf.pdf
    • https://cdn-cms.f-static.net/uploads/4455195/normal_604b4842b9276.pdf
    • https://woxolifufoku.weebly.com/uploads/1/3/4/2/134234665/zokegeletijepime.pdf
    • https://rimozaruminipa.weebly.com/uploads/1/3/5/3/135391391/e710ba668a1.pdf
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/segovotikeputasi.pdf
    • https://mifojarodileg.weebly.com/uploads/1/3/4/7/134707921/9352213.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0f63fd13-fbaf-45da-bdde-8497a0514e07/17464217047.pdf
    • https://uploads.strikinglycdn.com/files/37bbd33f-eed2-4e4b-97b0-238dee2a23a2/prefix_and_suffix_worksheets_for_grade_8.pdf
    • https://uploads.strikinglycdn.com/files/6c6cab30-7eef-4115-acf3-c19e2f8541d0/2011_rav4_oil_type.pdf
    • https://uploads.strikinglycdn.com/files/bce86640-1804-48a8-a46a-532fb9cb4604/josijiwitadakepisofujepew.pdf
    • https://uploads.strikinglycdn.com/files/4155b15c-5960-4988-beb2-c50a041898a2/how_to_add_transmission_fluid_to_a_2009_ford_escape.pdf
    • https://uploads.strikinglycdn.com/files/685faca4-151d-4a0e-a6bc-5963fba6f06b/does_wireless_keyboard_work_with_ipad.pdf
    • https://uploads.strikinglycdn.com/files/be29fd7a-5e3e-4c17-a6de-31319d10f375/how_to_download_xforce_keygen_autocad_2014.pdf
    • https://uploads.strikinglycdn.com/files/9877a751-d120-4893-ba88-392825ce3ad9/37590296255.pdf
    • https://uploads.strikinglycdn.com/files/046de741-beb9-4e50-85e4-7386973f597f/goodman_gmp075_3_high_limit_switch.pdf
    • https://uploads.strikinglycdn.com/files/6ae0b3bb-1590-45fa-86e6-10830ad99313/bright_starts_convertme_swing-2-seat_orson.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69c.bin
68a3cd4bf23c9f2088d8f9b9536903b984a4b69962a0a8a535e80e5e5ce7684b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 5596 bytes
font_01_sfnt_off00010985.bin
49a3784b52b465bd67e14202d50ce802808cc3f32726492d83904385ce10abc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10985 11848 bytes

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