PDF malware analysis — malicious · a91a45937c755842

MALICIOUS

PDF

76.4 KB Created: 2021-05-20 01:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 568a9adf942a452aaadb3ec8e041e50e SHA-1: 25eb761b8d487742db0a83db5b65813e37cc1799 SHA-256: a91a45937c7558422d53a3270c4a99b486a5a1b61e4f269b1319da897d785d30

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file is identified as a phishing trojan by ClamAV and a machine learning classifier. It contains a large number of external links, many of which point to SEO spam content, indicating a link farm tactic. The document's apparent purpose is to deceive users into clicking malicious links, potentially leading to further compromise.

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://midufefew.ru/strik?utm_term=sales+executive+job+responsibilities+pdf PDF link annotation
- https://dowitunixobutoz.weebly.com/uploads/1/3/1/0/131070317/kored.pdfIn PDF document text
- https://fegikunula.weebly.com/uploads/1/3/4/4/134482285/9514472.pdfIn PDF document text
- https://nupebovewurezo.weebly.com/uploads/1/3/2/7/132710783/4961645.pdfIn PDF document text
- https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/luvaka.pdfIn PDF document text
- https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/rexetesaragiw_lokivobuv_nokorinitikalu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475861/normal_604d1675644f1.pdfIn PDF document text
- https://kaxaxelakag.weebly.com/uploads/1/3/4/2/134235500/79840.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411220/normal_5fe2047038f43.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393776/normal_6031e7e3c2da3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368998/normal_5fc94a809fcfd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495694/normal_604631823583f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/wixatax/perspex_sheet_cut_to_shape.pdfIn PDF document text
- https://s3.amazonaws.com/vebenok/oreilly_python_for_data_analysis.pdfIn PDF document text
- https://s3.amazonaws.com/xakajoziwibi/59024095553.pdfIn PDF document text
- https://s3.amazonaws.com/ruzaganog/what_percentile_is_152_on_the_gre.pdfIn PDF document text
- https://s3.amazonaws.com/xoxaneral/academic_writing_rules.pdfIn PDF document text
- https://s3.amazonaws.com/zarevizebi/dietary_guidelines_advisory_committee_scientific_report.pdfIn PDF document text
- https://s3.amazonaws.com/boxujetanonikuv/plantronics_co52_manual.pdfIn PDF document text
- https://s3.amazonaws.com/xanunafojuloki/diruvuxofigobo.pdfIn PDF document text
- https://s3.amazonaws.com/livivuvuwugeb/why_wont_netflix_work_on_my_wii_u.pdfIn PDF document text
- https://s3.amazonaws.com/feborobegibew/bristol_city_council_report_repairs.pdfIn PDF document text
- https://s3.amazonaws.com/nemafu/wubiz.pdfIn PDF document text
- https://s3.amazonaws.com/bulolimepol/walmart_financial_report_2018.pdfIn PDF document text
- https://s3.amazonaws.com/nitatotol/69073989530.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC54	5596 bytes
SHA-256: `9e431051bad4c0b97d745fa037ed1df5e8817e5d00fec3cf4fd709e81625817f`
`font_01_sfnt_off0000ff72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF72	10640 bytes
SHA-256: `52bddbac4f41fb2c322ef2ce29c98a3f497893c49a33d0af04b4a2081513f4eb`

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