PDF malware analysis — malicious · 7bb5c7326932d2cc

MALICIOUS

PDF

69.7 KB Created: 2020-12-21 01:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 8744281d22fe35fa0ff7c5e00a1c8883 SHA-1: 17a372156746e20d9f6355ae37c7de4e5553d52c SHA-256: 7bb5c7326932d2ccdb1c18a1be2848c9fa5fac35676213a42914007735988cb6

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to known malicious infrastructure and a large link farm hosted on disposable domains. The ML classifier also assigned a very high probability of maliciousness. The embedded URLs and the nature of the heuristics suggest this document is designed to redirect users to phishing or malware-hosting sites, likely as part of a spearphishing campaign.

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
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://ggtraff.ru/strik?utm_term=hardwood+hearts+free+download In PDF document text
- https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/8628489.pdfIn PDF document text
- https://xumokiregiw.weebly.com/uploads/1/3/4/2/134266049/ponojugi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456378/normal_5fbad1ada1ddb.pdfIn PDF document text
- https://namavikevak.weebly.com/uploads/1/3/2/7/132740743/nukap_jadizetupugave_vugidodo.pdfIn PDF document text
- https://terobatef.weebly.com/uploads/1/3/4/3/134397950/vakirofefuso.pdfIn PDF document text
- https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/xunozozosasi_junepakuvutubam_vibimeritaked.pdfIn PDF document text
- https://razijidepafex.weebly.com/uploads/1/3/4/8/134891772/taniwiru-gotoz-ropedilujap-riratinulovobog.pdfIn PDF document text
- https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/fosizuna-rivelikejik.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460706/normal_5fa33bf65ba52.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380691/normal_5f8b783bdbb8c.pdfIn PDF document text
- https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/xekusoxu.pdfIn PDF document text
- https://jowizixevudaw.weebly.com/uploads/1/3/4/4/134489406/685ab10c3c53.pdfIn PDF document text
- https://buxiwizekekaxe.weebly.com/uploads/1/3/4/6/134662233/satenetefaw-bunirone-maditugelus-nesaz.pdfIn PDF document text
- https://mivodijabid.weebly.com/uploads/1/3/4/7/134732330/popapezusasinuje.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/fasanag/98071871331.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000be5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE5E	5048 bytes
SHA-256: `138c6fde0f1e840d70a70b69e6ae0d998cc77f7d7af0b6d47642f816ed8460b7`
`font_01_sfnt_off0000cf96.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF96	10920 bytes
SHA-256: `65bae88ae2c76c0b1ea9c622c3564f1f51452a9476367e440147a0fd13acd562`
`font_02_sfnt_off0000f4ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4AB	16144 bytes
SHA-256: `764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf`

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