PDF malware analysis — malicious · 2c9ba0f73a241c83

MALICIOUS

PDF

86.5 KB Created: 2021-05-20 01:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: ec1f560a666002b84f72b4bb24fe0e13 SHA-1: d74f3dc5fac8a1b6b54c438a25c5be715e872fdc SHA-256: 2c9ba0f73a241c83b2aca811ea50df2e10f8de696625f43fb623f0d7ce3a40ce

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of a URL with a 'phishing' term in its query parameter and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. No scripts were extracted, but the PDF structure and external links are indicative of a malicious lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://vilenefex.ru/strik?utm_term=phim+ho%25E1%25BA%25A1t+h%25C3%25ACnh+chuy%25E1%25BB%2587n+t%25C3%25ACnh+c%25C3%25B4+tr%25C3%25B2 PDF link annotation
- https://wajativakol.weebly.com/uploads/1/3/4/7/134749030/977c11ca938b.pdfIn PDF document text
- https://nububoreral.weebly.com/uploads/1/3/4/4/134467099/dulefisulodorabu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426954/normal_60484a333da18.pdfIn PDF document text
- https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/6336876.pdfIn PDF document text
- https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/9b64dbecf46412c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379046/normal_5fe6fd0006c87.pdfIn PDF document text
- https://xelopapet.weebly.com/uploads/1/3/0/7/130775154/porezitupof-kotanavokutatom-sevid-zekuzuxig.pdfIn PDF document text
- https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/tikuzufowe-diliw.pdfIn PDF document text
- https://nanarimedut.weebly.com/uploads/1/3/2/6/132695535/temuzesipojuturulegi.pdfIn PDF document text
- https://fezipogapatud.weebly.com/uploads/1/3/4/8/134888370/912635.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478664/normal_5fe637adf199d.pdfIn PDF document text
- https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/pexifibevu.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/rolefosiju/kubijugobisuxo.pdfIn PDF document text
- https://s3.amazonaws.com/donukadizolin/kizezonuzojuvususilebuv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9d3cd31d-dab8-4f35-b8e4-29983ee821b6/zegupeloruzigopejibin.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d388011d-d9b5-4a42-8e89-1ce90d166949/soleus_window_air_conditioner_troubleshooting.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cb06bb40-ac0b-4c0f-b5d7-ce07b7fd7ead/samsung_galaxy_s5_price_in_pakistan_second_hand.pdfIn PDF document text
- https://s3.amazonaws.com/genijusemu/veripomo.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_off0000f574.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF574	4692 bytes
SHA-256: `3bdaf7e513d58d175ed307755319ff0018f9078097f374181c422e1d7b9f8d02`
`font_01_sfnt_off000105e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105E4	5448 bytes
SHA-256: `c9b051fe8210ea5a12eec58bd6eec011411b798cd5bcc87dfab4c6c465d7c4c3`
`font_02_sfnt_off00011777.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11777	23880 bytes
SHA-256: `766ad4ce3e9ddc00dd0cfb74def6e86f89f4257dbed5eb0f5ba6085887ea16ce`

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