PDF malware analysis — malicious · 100cfe017506cbcb

MALICIOUS

PDF

78.3 KB Created: 2021-04-07 04:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: e572507f11e51ce66adb954d92d195d2 SHA-1: 54000baaa30d4903e612d1c91509dc91267556e1 SHA-256: 100cfe017506cbcb6844c848b8f28a0f2692f76ae10ae03a58f3c4fbcbd52ace

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9991

Heuristics 5

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.
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://xajibur.ru/strik?utm_term=sb-22+flash+price PDF link annotation
- http://peteferix.mypressonline.com/74182335778.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426425/normal_605882f631c47.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369504/normal_6015ee96c2613.pdfIn PDF document text
- http://figuxovutofid.mygamesonline.org/acuerdo_de_basilea_3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382790/normal_602b6bea87bb8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387819/normal_602a0de15d835.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415739/normal_6066e1256f5ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452599/normal_605c0f59de8e6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4422628/normal_5ff7184a75be9.pdfIn PDF document text
- http://rexevivejegox.scienceontheweb.net/83973524323.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446152/normal_6041158970d31.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
- http://kilarosine.atwebpages.com/candidiasis_peneana_tratamiento.pdfIn PDF document text
- https://s3.amazonaws.com/zasepo/lincoln_180_vs_hobart_140.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2a3809f9-1378-4a4f-96a9-d6e187cd511f/minn_kota_ulterra_saltwater_reviews.pdfIn PDF document text
- http://gurabagoderes.atwebpages.com/what_is_the_correct_order_of_the_hobbit_movies.pdfIn PDF document text
- http://wenares.myartsonline.com/lovefa.pdfIn PDF document text
- http://gipebevu.atwebpages.com/what_are_the_benefits_of_vocal_warm_ups.pdfIn PDF document text
- http://ligujizulogi.atwebpages.com/96923526209.pdfIn PDF document text
- https://s3.amazonaws.com/dojonuta/interview_questions_and_answers_for_secretary_receptionist.pdfIn PDF document text
- https://s3.amazonaws.com/gulapore/89404608968.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0e40c4ae-fa83-4276-863c-d4106e7abb9a/78664353897.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7339c82a-68b5-4e8d-b791-c2f1dc9f1733/44850856715.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d074.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD074	5004 bytes
SHA-256: `4d8a61cd648550aee610a3da727096eae298bdd62206dd96bfb5938558a784c2`
`font_01_sfnt_off0000e17b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE17B	11236 bytes
SHA-256: `8bbfcbf506be4e8c5146268955b163a22db4fd38e4975d27d611aff5fffd2e8f`
`font_02_sfnt_off00010832.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10832	16164 bytes
SHA-256: `ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8`
`font_03_sfnt_off00011d4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D4B	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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