Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad2e3f36eed7fa0…

MALICIOUS

PDF

85.4 KB Created: 2021-03-27 16:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f8605a89f1ba6dc4c3577b895979641c SHA-1: 8b5991e98f4628590d384b4c74fd18cccc8896fd SHA-256: 3ad2e3f36eed7fa0c1240c8c99434db0f27c227fe118aec708622c02e33b0bd7
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO scam designed to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=fairy+tales+in+easy+english PDF link annotation
    • https://cdn.sqhk.co/rowagana/dicgiH4/110_septa_bus_schedule.pdfIn PDF document text
    • http://glossywp.online/6952143204pdkv.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/S8nXhbm/25210989059.pdfIn PDF document text
    • https://rumirasikimuzib.weebly.com/uploads/1/3/2/7/132710795/busutojutafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_600a6673731b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5fceceda68e21.pdfIn PDF document text
    • https://susesape.weebly.com/uploads/1/3/4/7/134734791/49e87b62da.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/7407063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454671/normal_605c493eee3b1.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/lelopipusin.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_6021cf637432b.pdfIn PDF document text
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/4273465.pdfIn PDF document text
    • https://cdn.sqhk.co/mapiwoda/hLOgjig/migonexidumofubupirajurim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481665/normal_603058f3dc5e1.pdfIn PDF document text
    • http://tryadasert.online/switch_pros_sp-_9100_mountjxldu.pdfIn PDF document text
    • http://nesozolifagezol.22web.org/aashto_lrfd_2020_si_units.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_cf7614baa5874fecae7db1a6d2888d70.pdf?index=trueIn PDF document text
    • http://sesugemedolaf.rf.gd/28948324777.pdfIn PDF document text
    • http://legukekujuso.rf.gd/free_offline_niv_bible.pdfIn PDF document text
    • http://xotomupifejiref.epizy.com/37414025312.pdfIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_768ded22dd7743089392ee217ba5292d.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_d650a4b77fbc4a9e8c95830e2e48d726.pdf?index=trueIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_b5528d16e0da42ecb370e395a20bfe46.pdf?index=trueIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_23d1564a792844ff85377d5bd4616c07.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F2 4684 bytes
SHA-256: 4f522fc9eafd23898d74f4d5a6038dffaffcb908b101fe9d2ccf6bce27324a8d
font_01_sfnt_off000115c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C6 10544 bytes
SHA-256: 8291689201c767eb2310e34ddc326bbda345b5f812be3d19862b84b0f58a6fa8
font_02_sfnt_off000139c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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