PDF malware analysis — malicious · ab38e7ca4b8e2b67

MALICIOUS

PDF

107.6 KB Created: 2021-04-07 01:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: f518f5f39706ecc391a7b46cbf432474 SHA-1: 4715b3a156055f3b87aeacedd31f2d27f8a08fba SHA-256: ab38e7ca4b8e2b67b2728bff16247834c41b0b05caecf651363eed28a96aa0d2

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://dafemum.ru/strik?utm_term=what+does+an+extended+metaphor+do PDF link annotation
- http://bejuzoz.iblogger.org/free_ccleaner_update_5._38_by_piriform.pdfIn PDF document text
- http://bevibopo.22web.org/84297079375.pdfIn PDF document text
- http://xagekofa.iblogger.org/away_in_a_manger_easy_piano.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428331/normal_603d8b44723df.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401694/normal_60558254294e9.pdfIn PDF document text
- http://waxinexedodupij.22web.org/jiwis.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484370/normal_60198c5943255.pdfIn PDF document text
- http://vezujabajiwive.22web.org/como_crear_un_archivo_de_fotos.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421783/normal_601cb7f63c9b4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495974/normal_5fcc989f1d84b.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://jijuvusibob.rf.gd/61536925054.pdfIn PDF document text
- http://wupatime.epizy.com/ciencia_definicion_filosofica.pdfIn PDF document text
- http://mawesawikatunus.epizy.com/98594591852.pdfIn PDF document text
- http://nomupig.rf.gd/pensum_arquitectura_uasd.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e493cfe7-0b7d-4c08-b096-c706dc9216f2/how_to_use_a_nespresso_aeroccino_3.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1ef97297-bad0-42d6-9365-d74d6a124ac3/dd-wrt_repeater_mode_not_available.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/76e88640-c589-4b42-b8ea-bda6e062aaea/construct_2_3d_tutorial.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cc88c342-79bf-48a0-888a-808bafd9b518/68930041030.pdfIn PDF document text
- http://genenapukiral.epizy.com/mividogetaxadonive.pdfIn PDF document text
- http://zuniguvip.epizy.com/dell_p2418d_user_guide.pdfIn PDF document text
- http://tifuponakeg.epizy.com/13493406704.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/80910820-b83c-4d17-80bd-c84ad5f1b8ad/how_to_reset_your_eon_smart_meter.pdfIn PDF document text
- http://tokofelutuj.epizy.com/duwez.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001455d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1455D	6156 bytes
SHA-256: `c58cb53fee927051f9d419b1700871753534db480995adaa2c172dd9ec183983`
`font_01_sfnt_off00015a6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15A6B	5248 bytes
SHA-256: `2fde89cba420903c349712609efe2a186a4d1d53fe6a7dfa7a862e18e27e8ac7`
`font_02_sfnt_off00016c20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16C20	2140 bytes
SHA-256: `3eadf3ff1ae85f7a2dd8be852d633ca148c1d24200a16cbd4325889adc5789c4`
`font_03_sfnt_off000175fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x175FA	11976 bytes
SHA-256: `8a4c8610833aa0e4747a8c707db8545ae32183f23ce2c9e33dffe86e86d97aeb`

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