PDF malware analysis — malicious · 6ac0aedaa2fb4c08

MALICIOUS

PDF

79.4 KB Created: 2021-03-16 01:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: bd4749216ea9f5ad816c43a416649b9a SHA-1: b257adaa907441e7a8b317080f6c51466d49618d SHA-256: 6ac0aedaa2fb4c08aa20d43e63ff96c190814aa5ccb1ca9afa7b8263486d31cd

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a lure related to package tracking, which is a common phishing tactic. The presence of an external URI pointing to 'nipisod.ru' is a primary indicator of compromise, likely serving as a redirect to a malicious site or payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/strik?utm_term=international+usps+tracking+number+format PDF link annotation
- http://bajemafo.iblogger.org/gegexodavaruniv.pdfIn PDF document text
- http://sokadap.22web.org/baazaar_full_movie.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368466/normal_600148ce58e4b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449614/normal_60101e06d1870.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367300/normal_5ffac7fed7a1f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471240/normal_60247cbccbf27.pdfIn PDF document text
- http://majizumedomowog.iblogger.org/char-broil_tabletop_gas_grill_how_to_light.pdfIn PDF document text
- http://nokekowukubu.22web.org/what_is_modern_typography.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367305/normal_6016f07104f7e.pdfIn PDF document text
- http://kawonipedo.22web.org/47074491609.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/31a237d0-add1-4858-b39c-a69044eb31a8/98894223754.pdfIn PDF document text
- http://satuvet.epizy.com/vigisike.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4062e45d-9c8b-426c-841d-b17bf75e1979/60603023397.pdfIn PDF document text
- http://wirowobizofox.epizy.com/beamer_latex_example.pdfIn PDF document text
- http://perevis.epizy.com/jupumuzovaputawor.pdfIn PDF document text
- https://s3.amazonaws.com/lebejos/how_to_service_a_grandfather_clock.pdfIn PDF document text
- https://s3.amazonaws.com/wisuw/27935536855.pdfIn PDF document text
- http://dibadedogiw.epizy.com/barclays_capital_securities_ltd_annual_report.pdfIn PDF document text
- http://baxolorojujore.rf.gd/67930234212.pdfIn PDF document text
- http://lixanixuzuki.rf.gd/kaspersky_antivirus_trial.pdfIn PDF document text
- http://pejaxuvotovu.rf.gd/kenmore_dryer_model_417_repair_manual.pdfIn PDF document text
- https://s3.amazonaws.com/lijopavexanuse/ruremenu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3882cd04-2b61-43e9-8a77-6a6397491456/how_to_negotiate_your_car_lease.pdfIn PDF document text
- http://tawatibajat.rf.gd/vexozerusulosefel.pdfIn PDF document text
- https://s3.amazonaws.com/runuzitexokol/rental_agreement_bangalore_stamp_paper.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_off0000f0d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0D4	5476 bytes
SHA-256: `f934c2bf1c38167318eee44cb246d154e21628dcc15431b509c0ca8951137819`
`font_01_sfnt_off00010359.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10359	1692 bytes
SHA-256: `dfb2d37823cd36008d12979cfd6060066624a87e8b27c8740545991243268d70`
`font_02_sfnt_off00010bd0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BD0	10404 bytes
SHA-256: `54d80ffdbc03a6719398e51a55757747b83d0fa87494afe44b6c347f6d6092fc`

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