PDF malware analysis — malicious · 2ef4b320cdaee33b

MALICIOUS

PDF

87.6 KB Created: 2021-04-13 23:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: c2c86b550f467d3e0f68a88f9df651a6 SHA-1: 84a26c16c9e21da8642e0d5048a5661e38030ccb SHA-256: 2ef4b320cdaee33bb50896e76227b4179b4de0d1e91921186fae2ca51256574d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to disposable domains, and is flagged as a link farm. The primary malicious URL, 'https://fokemale.ru/strik?utm_term=is+indian+stock+exchange+closed+today', suggests a phishing or malware distribution attempt disguised as a search result. ClamAV detection and ML classification confirm its malicious nature, likely related to phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/strik?utm_term=is+indian+stock+exchange+closed+today PDF link annotation
- https://cdn-cms.f-static.net/uploads/4392462/normal_600e4a5ef035a.pdfIn PDF document text
- https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/1893e6db9d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471249/normal_6018d46d46063.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419206/normal_6061c95ef2eff.pdfIn PDF document text
- http://all-casino.xyz/what_do_velocity_vs_time_graphs_showul55p.pdfIn PDF document text
- https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/5917057.pdfIn PDF document text
- http://ejinaya.com/33744133779l6mdg.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452607/normal_604d3883b402a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443574/normal_60322bb8e9b97.pdfIn PDF document text
- http://hallop.xyz/bagefutorevogijicx2wy.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://xesidif.epizy.com/fisiopatologia_del_pancreas_endocrino.pdfIn PDF document text
- https://79c9c32e-6572-42fd-9c0e-61d057d48a34.filesusr.com/ugd/33a1c8_4d44f7c34bc3474984326d9870b7d41a.pdf?index=trueIn PDF document text
- http://sozanizitug.epizy.com/7980781797.pdfIn PDF document text
- http://mabazojow.rf.gd/balada_de_los_dos_abuelos.pdfIn PDF document text
- https://s3.amazonaws.com/limepusotanal/57534304018.pdfIn PDF document text
- https://b09d99c6-da67-4e55-b5b3-baceba093817.filesusr.com/ugd/a69c6c_ad40f7d1f3fe4407aebc9c3a95ecd647.pdf?index=trueIn PDF document text
- https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_e295f7a652234d2481c109924ed7fafa.pdf?index=trueIn PDF document text
- https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_641ad5ad05b54d0ea8b67b357fdd4b99.pdf?index=trueIn PDF document text
- https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_9691dc40efc444aeb19ea105a1024884.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fajixe/cheque_stop_payment_request_format.pdfIn PDF document text
- https://s3.amazonaws.com/dowadotiju/reading_comprehension_5th_grade.pdfIn PDF document text
- https://s3.amazonaws.com/nerugiraxura/carillion_auditors_report.pdfIn PDF document text
- https://s3.amazonaws.com/xakajoziwibi/39438387914.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_off0001024a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1024A	5276 bytes
SHA-256: `6eeb483e969edf235329b33b7eec8b0f973c5c2b667a3eb715a5b58548bfd047`
`font_01_sfnt_off00011449.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11449	11432 bytes
SHA-256: `dffe0f945e70fc53cac99a16397f474586e3b8eaac94a6a9b7574068963f61fd`
`font_02_sfnt_off00013bac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BAC	16092 bytes
SHA-256: `9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2`

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