PDF malware analysis — malicious · 6cfd9ae23c7b54c1

MALICIOUS

PDF

83.9 KB Created: 2021-03-15 20:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 5a0ba0abacd43ed292ee44fdc6d3a017 SHA-1: 747f40640d10982b2544fb9cb9e69b17cfe0a037 SHA-256: 6cfd9ae23c7b54c157b62467d52331d6add54fbe1aa6c0382c6c675731f0ffc6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

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.
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/award?keyword=bioethanol+production+from+lignocellulosic+biomass+pdf PDF link annotation
- https://wazivako.weebly.com/uploads/1/3/0/9/130969042/5957861.pdfIn PDF document text
- https://dewejudinasul.weebly.com/uploads/1/3/4/7/134702466/cf2b8.pdfIn PDF document text
- https://sinepakeje.weebly.com/uploads/1/3/4/4/134490574/4573403.pdfIn PDF document text
- https://bujevajixa.weebly.com/uploads/1/3/1/6/131637668/tesuxunemek-gaxudesad-zisuwunudigowe-tumowukif.pdfIn PDF document text
- https://lerasakob.weebly.com/uploads/1/3/2/6/132682990/xawemonojizok-baxituxuwu-vuviw-tetarolivoji.pdfIn PDF document text
- https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/4681603.pdfIn PDF document text
- https://revegeworosopo.weebly.com/uploads/1/3/1/6/131637057/bepebej_jomume_kawekoneveropev_xefodibubivim.pdfIn PDF document text
- http://gojawufeki.getenjoyment.net/xatatawefejupewejir.pdfIn PDF document text
- https://luxovozudenez.weebly.com/uploads/1/3/4/1/134108910/d9580eb5ab6603d.pdfIn PDF document text
- https://betirowi.weebly.com/uploads/1/3/4/6/134661799/6583793.pdfIn PDF document text
- https://talinupujisen.weebly.com/uploads/1/3/4/5/134591269/kevenesefikowakutuva.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://s3.amazonaws.com/voxipanovigepiv/65005597820.pdfIn PDF document text
- https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_bbe5a0558a614be4866683937acd1576.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/metubevozisul/mifiporivetipa.pdfIn PDF document text
- https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_b48d1d4e24354aeaa7b041ba401b02f5.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/rizijubovapuk/77495679111.pdfIn PDF document text
- https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_3b97540c4bef4d3cb33569dd400b7a0b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/daraniwekamidir/activemq_tutorial_for_beginners.pdfIn PDF document text
- https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_79f9b397d9d64bb09e0ab8e35d5f3b3c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xoxaneral/3824677718.pdfIn PDF document text
- https://s3.amazonaws.com/gozilum/modern_control_engineering_4th_edition_by_katsuhiko_ogata_solution_manual.pdfIn PDF document text
- http://xomutojekes.myartsonline.com/assembler_des_en_ligne.pdfIn PDF document text
- https://s3.amazonaws.com/pegozegi/alberta_tenancy_agreement_inspection_report.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f9f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9F1	5640 bytes
SHA-256: `9791f9286c4a09f043ae789074d5c115ad05c4102bbb7f9bc41772fef25c76ed`
`font_01_sfnt_off00010ce1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CE1	11752 bytes
SHA-256: `44673d643aa9ae2aa2b7e80ee9023d166a0c1ef1fcd260153de044b5c818e9e0`
`font_02_sfnt_off00013332.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13332	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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