PDF malware analysis — malicious · 9870baeeb90c9e7d

MALICIOUS

PDF

80.6 KB Created: 2021-09-09 15:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 54d1c3a0550a97143e6b2230e05e9d76 SHA-1: 7653cc9dc9ef65a21454704b359611912ffaa705 SHA-256: 9870baeeb90c9e7d62dfdb8f29577ab22e6f995303974dd81284ac62aa9efd88

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a lure to redirect users to potentially harmful websites. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://drafthe.ru/uplcv?utm_term=after+2+book+pdf PDF link annotation
- http://www.mostex.sk/files/articles/file/pebakokexupef.pdfIn PDF document text
- https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16132603227f4f---89005171735.pdfIn PDF document text
- http://permanentnimakeup-brno.cz/userfiles/files/8693940845.pdfIn PDF document text
- http://harckocsik.hu/userfiles/file/63583980673.pdfIn PDF document text
- https://terracetemayonetim.com/upload/ckfinder/files/64890412064.pdfIn PDF document text
- https://eric-parnes.shortex.com/ckfinder/userfiles/files/98788229054.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/1e6f08bfd6314beb81776952208d2cf5/sunosasa.pdfIn PDF document text
- http://ncdesign.it/userfiles/files/14048983500.pdfIn PDF document text
- http://saraiaser.nl/userfiles/file/jexovap.pdfIn PDF document text
- https://gamedunyasi.com/calisma2/files/uploads/77211633837.pdfIn PDF document text
- http://chickendaylacrescenta.com/uploads/files/2364816007.pdfIn PDF document text
- http://accapierre.it/userfiles/files/tawowerosujuzarinibusiza.pdfIn PDF document text
- http://hrudolf.com/userfiles/sijurirazalemigeme.pdfIn PDF document text
- https://xinpayflow.com/ckfinder/userfiles/files/32811522705.pdfIn PDF document text
- https://chambredhotes-savoie.com/ckfinder/userfiles/files/77237875083.pdfIn PDF document text
- http://soluzionebenessere.eu/userfiles/files/41001941775.pdfIn PDF document text
- http://bsp-oblspl.org/ckfinder/userfiles/files/87290538128.pdfIn PDF document text
- https://hinodecoder.com/userfiles/file/89991970579.pdfIn PDF document text
- http://truhlarstvi-strakonice.cz/files/file/5720101195.pdfIn PDF document text
- https://nbcmedia.vn/ckfinder/userfiles/files/jifaxosimanodugixoxere.pdfIn PDF document text
- http://kargo-box.com/uploads/files/43987213207.pdfIn PDF document text
- http://sh-ruiyangcpa.com/userfiles/file/2021-9///2021961420376176.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://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_off0000d888.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD888	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f09f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF09F	10252 bytes
SHA-256: `b2a3bb60e2a86f0f3de5b6aab8de62d4202f7e4966f26d2fbd2c3db673fca7e0`
`font_02_sfnt_off000107a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107A2	17480 bytes
SHA-256: `6ac7169c39797bc26cb117830810cdabbff1c21cd4f61533b9adb27600f5e529`

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