Malicious PDF — malware analysis report

Static analysis result for SHA-256 d825a6af0725cc4a…

MALICIOUS

PDF

79.4 KB Created: 2021-05-09 23:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bad63c843f3204e03950c7e08834990d SHA-1: 29772709b6d9b0a2bfce8c2fe6325b9df9cb8eb9 SHA-256: d825a6af0725cc4a3b64e5d4591847c1fc20187c3e7d99e230707329021d8b31
156 Risk Score

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, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to PDF files, suggesting it is part of a link farm designed to drive traffic or potentially host malicious content. The embedded URLs and the heuristic firing for PDF_SEO_LINK_FARM strongly indicate a tactic to manipulate search engine results or direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=best+router+for+frontier+fios+2020
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/3db8c2ac.pdf
    • https://cdn-cms.f-static.net/uploads/4476766/normal_5fd0e524bb600.pdf
    • https://cdn-cms.f-static.net/uploads/4443619/normal_604a7dbd9062b.pdf
    • https://cdn-cms.f-static.net/uploads/4370286/normal_600be5bacead7.pdf
    • https://norabemomo.weebly.com/uploads/1/3/0/9/130969424/koxixo-divutuvajana-pukajuvorojibo.pdf
    • https://jogelobob.weebly.com/uploads/1/3/5/9/135961552/monaj.pdf
    • https://cdn-cms.f-static.net/uploads/4486045/normal_605a512575d55.pdf
    • https://pixilorazuj.weebly.com/uploads/1/3/4/8/134892738/xilezeli.pdf
    • https://mikiwugatuvul.weebly.com/uploads/1/3/5/3/135318334/f8d4f96803f784.pdf
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5ff25c6194f2d.pdf
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/40f78.pdf
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/707288.pdf
    • https://lutovadefok.weebly.com/uploads/1/3/3/9/133997447/nogarix_suputexepisi_pefazasogisikez_tatavuk.pdf
    • https://lifefoxametuzov.weebly.com/uploads/1/3/1/3/131383893/zativomad_kebaget_wusuzufevaxesa_fexazelazaka.pdf
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/56eb0e74.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_2d0c47473fe441479d5a386848ce5418.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0b96c6a4-846a-456c-bd93-e3dd8b7d6baa/73960423194.pdf
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_d588c50a3be646dbab5410dde5eb6dee.pdf?index=true
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_1359b22b0cea4d0d9c93f663243c082e.pdf?index=true
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_8761676a73094d018bff21baaf98535b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/570c5d18-8f9c-438b-87e2-46c7860f8bb4/85046820118.pdf
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_62a903eba4aa453287e4a5cac4442eb6.pdf?index=true
    • 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_off0000fb5a.bin
c3e7cc1b236107fcdde2acd96e2ad32be64393c424e12a529e4024befc099f4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 4840 bytes
font_01_sfnt_off00010be5.bin
3b4f14d16b9879ba6ec9fe84f9cd789b953420d9643cabaa05f7c0588a9d84ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 10728 bytes

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