PDF malware analysis — malicious · 06c62028a9784bfa

MALICIOUS

PDF

84.7 KB Created: 2021-03-20 20:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 3881c23cec03b85f1c66498690a5e59b SHA-1: 40174bbc3cb076e7a2d76446038301de05b9b601 SHA-256: 06c62028a9784bfa04f2f7cb0c996349e0b44679a763e8b07de5001a1aa2f7c9

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, a characteristic of link farms used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the presence of external URIs and the ML classifier's high confidence indicate malicious intent. The document body is heavily obfuscated and contains metadata about its creation, but does not provide clear user-facing content.

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://resalured.ru/123?utm_term=kadhal+kavithai+song++tamil PDF link annotation
- https://cdn-cms.f-static.net/uploads/4366036/normal_601beef54d587.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383304/normal_6042227c56c40.pdfIn PDF document text
- http://guxabena.22web.org/hoover_windtunnel_3_high_performance_reviews.pdfIn PDF document text
- https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/9305571.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409110/normal_6055ab3a6307c.pdfIn PDF document text
- https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/8446270.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462694/normal_604d46a1863cf.pdfIn PDF document text
- https://cdn.sqhk.co/kigaratak/bih4jiw/viraba.pdfIn PDF document text
- https://volifutizur.weebly.com/uploads/1/3/4/6/134602954/6747628.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446045/normal_6032acd3107e1.pdfIn PDF document text
- https://xapeposatu.weebly.com/uploads/1/3/1/4/131437079/7927480.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460983/normal_5fedbd17406bb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4453342/normal_5fef81967bb70.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418570/normal_604fb628554cf.pdfIn PDF document text
- https://cdn.sqhk.co/towinomer/iiwKibY/my_android_phone_is_slow_on_wifi.pdfIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://loluwoje.epizy.com/69295899323.pdfIn PDF document text
- http://zawozunilutufu.rf.gd/segubikizadetevir.pdfIn PDF document text
- https://s3.amazonaws.com/pibajuwi/midpoint_and_distance_formula_worksheets.pdfIn PDF document text
- https://s3.amazonaws.com/dixaleko/8633013181.pdfIn PDF document text
- http://wifeturarotalov.rf.gd/65505632947.pdfIn PDF document text
- https://s3.amazonaws.com/nuruvapozixix/cdc_zika_virus_guidelines.pdfIn PDF document text
- http://nazifaba.rf.gd/82406426918.pdfIn PDF document text
- https://s3.amazonaws.com/lotibabakuj/pupek.pdfIn PDF document text
- https://s3.amazonaws.com/rivazixexuguri/android_3d_game_development_tools.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
`stream_003_off0000f574.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xF574	20452 bytes
SHA-256: `9a15155ef063bd0f3a262ba3daf7124de38d5bb4ccfe2134f8b8e31f890b2770`
`font_00_sfnt_off0000e3c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3C6	5236 bytes
SHA-256: `8245cf681b459e433c0f486ef7fa0eceb2df86eda5a4126674fdb55db22d987b`
`font_02_sfnt_off00012115.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12115	9696 bytes
SHA-256: `d4bf6c695d71e35e86a5348485fe685fb1569f43c119c53b9a250b9eb1c53f93`

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