PDF malware analysis — malicious · 913cba72b571ad82

MALICIOUS

PDF

67.1 KB Created: 2021-02-23 10:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: a66d5be1e1840ce868ab913365c2e4df SHA-1: a1db3dfaef7b84e7c0c859360c5892b6d734b9c0 SHA-256: 913cba72b571ad82830a98f8317bfefd8f24ff8ed17f1b35945bbb7dad0b97f5

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, appears to contain product information, suggesting a lure for phishing or malware distribution. The presence of numerous external links indicates an attempt to direct the user to potentially harmful websites.

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://crophysi.ru/strik?utm_term=philips+norelco+series+5000+replacement+shaving+heads+sh50+3+count In PDF document text
- https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/9303944.pdfIn PDF document text
- http://golden-charm.ru/dagiboramudesidonezonirukmxx27.pdfIn PDF document text
- https://cdn.sqhk.co/lamiwifa/hgzjchf/julaveta.pdfIn PDF document text
- https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/timatupaxugep.pdfIn PDF document text
- http://stroiline74.ru/pegisizufatubuxadoposumytwod.pdfIn PDF document text
- https://jinabotulopel.weebly.com/uploads/1/3/4/6/134602701/c2de5f308f7d211.pdfIn PDF document text
- https://rategojo.weebly.com/uploads/1/3/0/7/130739688/df037.pdfIn PDF document text
- https://bumopabir.weebly.com/uploads/1/3/4/6/134679094/wafezuvawa-gazejevonoli-paketar-lunobin.pdfIn PDF document text
- http://thedefenseforge.com/43152885755ktgl0.pdfIn PDF document text
- http://jumbochecker.com/sakugubumaruxenegimelam3e89b.pdfIn PDF document text
- https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/216284fb6ff.pdfIn PDF document text
- https://sugelazo.weebly.com/uploads/1/3/4/7/134767002/8522219.pdfIn PDF document text
- https://komijeji.weebly.com/uploads/1/3/1/6/131606126/duzetipejikap_buteketip.pdfIn PDF document text
- https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/luxopalazufoxo.pdfIn PDF document text
- http://getveran.site/tourist_bus_simulator_free_download_for_androidt0cvl.pdfIn PDF document text
- https://cdn.sqhk.co/zolewiko/Gdijhbz/senire.pdfIn PDF document text
- http://fresh-ita.space/59810014939l70qd.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
- 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_off0000ba17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA17	5860 bytes
SHA-256: `04d0bcd734630680235c198ea518d7213405bd5df095dd563ef425c28ee4e7ee`
`font_01_sfnt_off0000cdd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDD3	10304 bytes
SHA-256: `725098345906b2df2cd6cc1896a2676a15184f1bbc9a1c86af2ac6d3f30aa7f9`
`font_02_sfnt_off0000f0d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0D7	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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