Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccd557c61e27fb7…

MALICIOUS

PDF

70.9 KB Created: 2021-03-28 04:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b5ec3b83b213d69f2e6633ac6c14992 SHA-1: d27a79e4965ab6f8c0585da54e777f47cc1bb0b0 SHA-256: fccd557c61e27fb7c089cb3394d1c78a53332c55505acfe71c04aac5656597af
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to external URLs such as 'https://ponafet.ru/123?utm_term=mailchimp+template+design+tips'. This behavior is consistent with phishing or malware distribution campaigns, where the PDF serves as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://ponafet.ru/123?utm_term=mailchimp+template+design+tips PDF link annotation
    • http://esclick.pro/99117965908c1cln.pdfIn PDF document text
    • https://baxugufidet.weebly.com/uploads/1/3/0/7/130776886/2490a4e2157.pdfIn PDF document text
    • https://vatubovelogised.weebly.com/uploads/1/3/4/3/134375195/mopirawojum.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/jazelemil-fadazabixa.pdfIn PDF document text
    • https://nesujuge.weebly.com/uploads/1/3/1/4/131407687/1de7f4a82.pdfIn PDF document text
    • https://fikadodovawewa.weebly.com/uploads/1/3/4/3/134320255/15881a3c6c56.pdfIn PDF document text
    • http://kfcrabota.ru/ic_engine_parts_and_functions_ppt4nfwe.pdfIn PDF document text
    • https://bisuduroj.weebly.com/uploads/1/3/4/7/134714880/3d637c66fa.pdfIn PDF document text
    • http://hookup157.online/woxub3t5m4.pdfIn PDF document text
    • http://kmplitka.shop/tipos_de_comunicaciones_inalambricas1wcu5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/734c4da7-0e5e-448e-a3a3-aa43d845a949/teorias_de_recursos_humanos_segun_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400e2985-b91d-4804-adf1-549603b52223/safety_first_ear_thermometer_how_to_use.pdfIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_129c3042625c400da3cd94c5deb4e167.pdf?index=trueIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_0b0804e3249a4e8cba2a39d4745c0cd1.pdf?index=trueIn PDF document text
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_6660fe9f67cd4d43baeb40f7f1af419c.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_8071ae601a5c49388f54343a56993ff5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e89aa3-44c8-4287-984b-10f189d07ea0/different_types_of_manufacturing_process_in_operations_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94660a4-7682-4487-ad54-8ee5becaca2d/16536039563.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_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 5396 bytes
SHA-256: a926e43408cf4d97c62f3e8d1eadbd3a2da940021d2570df39043d12167c554d
font_01_sfnt_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 10120 bytes
SHA-256: 0f7958888c0217f50acfdebc4b9a9b5d0e8050efc5f8eaf93c78ba0d203d4ea1