PDF malware analysis — malicious · d5a824e887af529e

MALICIOUS

PDF

80.4 KB Created: 2021-04-26 17:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 1b9aaf9ed8b0213222fb723c55187cf9 SHA-1: 72d72456355c9b6981cc55c9b5e1f5afb5e2f86a SHA-256: d5a824e887af529eb807acf7d2325694798e76bfca72ae7b6617ee38588d30b3

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or link farm attack. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect users to harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further indicates a high volume of links on disposable hosting, reinforcing the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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 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://leonvi.ru/strik?utm_term=data+science+course+in+mumbai+university PDF link annotation
- https://cdn-cms.f-static.net/uploads/4491153/normal_6062ed32cc8b8.pdfIn PDF document text
- http://akillidestekbasvuruformu.online/vebomujoxtjola.pdfIn PDF document text
- http://xulodol.mygamesonline.org/15954869161.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413231/normal_5fd09c75eced5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460677/normal_6033bc244cf90.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4482618/normal_5fdd407683359.pdfIn PDF document text
- http://mirumumavetifun.mypressonline.com/what_is_a_custodian_of_records_affidavit.pdfIn PDF document text
- http://logunesunoj.medianewsonline.com/lufetenixewujanekofakoj.pdfIn PDF document text
- http://zumepaposakuf.scienceontheweb.net/zefexuba.pdfIn PDF document text
- http://dakisemakegag.sportsontheweb.net/33932539921.pdfIn PDF document text
- http://lirifajo.sportsontheweb.net/nusekepasefudobolejivuz.pdfIn PDF document text
- http://rineset.xyz/voruxowafobizemefexknrq1.pdfIn PDF document text
- http://nafewid.sportsontheweb.net/monoclonal_and_polyclonal_antibody.pdfIn PDF document text
- http://tryse.xyz/580214182887cck9.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://5e7fdb44-65a6-4d88-9b36-b69c04d36e08.filesusr.com/ugd/b547b4_7dd9beee3df147f6a272b064e38d5dfc.pdf?index=trueIn PDF document text
- https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_bc02458fda67406cbb298d6dc560df4c.pdf?index=trueIn PDF document text
- https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_60bf0600b95a46a0ac0b3c0c510e3a9b.pdf?index=trueIn PDF document text
- https://a513df27-8ea1-49e5-9b48-af726a3c99b5.filesusr.com/ugd/c567c1_c74daed10f1e462eb78eb0f6ba66b40c.pdf?index=trueIn PDF document text
- http://fabonejane.onlinewebshop.net/tujux.pdfIn PDF document text
- http://sawurawefivovo.myartsonline.com/9754556829.pdfIn PDF document text
- https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_34dc7c92e91949c0bd906ca59f595d8f.pdf?index=trueIn PDF document text
- http://xazopufegi.onlinewebshop.net/bass_guitar_scales.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_off0000edc3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDC3	5096 bytes
SHA-256: `e6015499a8477de5a575e5d2a1fa9fac07f1e557a5d1114c03b5158a592f7302`
`font_01_sfnt_off0000ff04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF04	11556 bytes
SHA-256: `738cc78a8b4d033560cb3c4e6b6ae90f153bcaed8a03a0d3bb660bf96225c76b`
`font_02_sfnt_off000125fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125FC	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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