PDF malware analysis — malicious · f13f771b454fea6d

MALICIOUS

PDF

80.4 KB Created: 2021-03-15 05:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 99aa230b3a666e37549ff4b90121cc3a SHA-1: a6a03d40cbc601fb0588e2a8086d5d7e4605b6c4 SHA-256: f13f771b454fea6d490732672171a321f39d95eb89bead7d81f78956b2af98d6

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and the presence of external URIs suggests an attempt to redirect the user. The document body, though heavily obfuscated, contains keywords that appear to be part of a lure to disguise the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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://soxebez.ru/wix?keyword=forest+lakes+subdivision+bayfield+co PDF link annotation
- http://sallehub.xyz/jugiwuvisgu9h.pdfIn PDF document text
- http://rukozhop-guide.com/fefilir9rpf3.pdfIn PDF document text
- http://girlita.space/27349079974ephd6.pdfIn PDF document text
- http://allerop.xyz/campbell_hausfeld_gas_pressure_washer_manualywrc7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4459788/normal_5fcbf6ad1d5bb.pdfIn PDF document text
- https://cdn.sqhk.co/nogedapuvul/aE9hghe/36704640625.pdfIn PDF document text
- http://macsk.space/opera_ballet_paris75r00.pdfIn PDF document text
- https://cdn.sqhk.co/gitovera/flSdjgR/80944701809.pdfIn PDF document text
- http://copyrightsupport-ig.com/jetepomisadodutmaza.pdfIn PDF document text
- http://leaninrzpd.site/glacier_bay_water_dispenser_leaking_from_bottomvs4lq.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373502/normal_60217250bd6c3.pdfIn PDF document text
- http://rent-nout.site/15576742133odtl5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4372963/normal_5fc80b57c7cca.pdfIn PDF document text
- http://dressnbuy.com/how_to_turn_off_honda_accord_maintenance_lightcbydw.pdfIn PDF document text
- https://cdn.sqhk.co/mojuzizimu/jjHjeJh/zuwotudiranapovaru.pdfIn PDF document text
- https://cdn.sqhk.co/ninulekuto/gjiggc6/sas_urban_survival_handbook_free_download.pdfIn PDF document text
- http://navalny.design/32532677831n2z75.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471711/normal_603eda1af3b79.pdfIn PDF document text
- https://cdn.sqhk.co/bapisolel/mt3HjfY/nasty_gal_returns.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_6427825b63be49f09afe0930bf784fec.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sivanira/69510646921.pdfIn PDF document text
- https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_a1333052f00b414b86b971d8b6a98531.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vuterijoze/23634998915.pdfIn PDF document text
- https://s3.amazonaws.com/rijaliwiguvex/7.62_bolt_action_rifle_parts.pdfIn PDF document text
- https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_8a275c784af2429db015412a86fe1304.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tuxutedi/88116417321.pdfIn PDF document text
- https://s3.amazonaws.com/zamuriza/tagalog_tongue_twister.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fafb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAFB	5336 bytes
SHA-256: `1e2de411bc3c5430c8d8f5096698533b33e4e21ebe0324c79beaa9e093db0661`
`font_01_sfnt_off00010d40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D40	11392 bytes
SHA-256: `ab351082ff3754bae62763383c88c67703c838e6bc44da66cdf0f8e8d030c028`

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