PDF malware analysis — malicious · 978cecca79412c46

MALICIOUS

PDF

83.2 KB Created: 2021-03-25 10:36:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: db3e8ab344e5320772a342f615e8b0b1 SHA-1: 57d06f11527c6b7262b28f9af4d20b6b7a542e82 SHA-256: 978cecca79412c46b686306d9693d5e5c2be74c864be6c811dcf251a506cf4fb

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
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://gimoguvi.ru/award?keyword=animal+welfare+act+of+1966+pdf PDF link annotation
- http://povulofi.mywebcommunity.org/pioneer_vsx-521_factory_reset.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369514/normal_5ff94c4d57d7e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4383806/normal_6006c655071dd.pdfIn PDF document text
- https://cdn.sqhk.co/rabovafom/gggf1ii/zagawiboj.pdfIn PDF document text
- https://cdn.sqhk.co/tinulafi/6hj8Tjd/weed_strains_appetite_suppressant.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415951/normal_6021126183175.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365608/normal_603427c701076.pdfIn PDF document text
- https://cdn.sqhk.co/maxanogefo/YJiaicH/22821551551.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459162/normal_5fd0f0b8796b6.pdfIn PDF document text
- https://cdn.sqhk.co/fabokofe/fPiNBU7/4779940630.pdfIn PDF document text
- https://cdn.sqhk.co/bulunazi/jh7jhgi/football_tournament_draw_generator.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475563/normal_6033ff7e6987c.pdfIn PDF document text
- http://tebogekememesij.mygamesonline.org/rheem_hot_water_heater_comparison.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4457876/normal_5ffbe4d88fe99.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/lososimap/business_case_study_format_example.pdfIn PDF document text
- http://kuzemepusiloj.onlinewebshop.net/what_are_the_four_sutras.pdfIn PDF document text
- http://mixezized.myartsonline.com/tindakan_asepsis_dan_antisepsis.pdfIn PDF document text
- http://totuxivez.onlinewebshop.net/characteristics_of_digital_computer.pdfIn PDF document text
- https://s3.amazonaws.com/wolawatin/what_milestones_should_a_7_month_old_have.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_off0000f999.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF999	5356 bytes
SHA-256: `e4760e490185f9f5d21a692f5292c6d598b671a613476ccf66971d7ef3fbe244`
`font_01_sfnt_off00010bb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BB5	11168 bytes
SHA-256: `6d05c5ffa08382bf6f321f8f2a8da0e09dd098a599c81ca5d70065c8c3d9ae0e`
`font_02_sfnt_off00013196.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13196	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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