PDF malware analysis — malicious · 2705b91bac0654ee

MALICIOUS

PDF

78.5 KB Created: 2021-04-03 06:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 1d058dc03b078b5d8c3efa3a97efdc16 SHA-1: 16f1c6578f3e9ec2c1cec122516f99204ad65b73 SHA-256: 2705b91bac0654ee52429d779d485f6fe72a42a0f3d24c6781f6feffb9ddaa52

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominent URL pointing to a link farm designed to trick users into downloading content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's part of a campaign to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=peek+biomaterials+handbook+pdf+download PDF link annotation
- https://cdn-cms.f-static.net/uploads/4366321/normal_603c3db5caad3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404490/normal_60678fa85aeb4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4475580/normal_60017fa4be601.pdfIn PDF document text
- https://cdn.sqhk.co/wavagowew/cheigji/serge_lutens_dent_de_lait_100ml.pdfIn PDF document text
- http://qiwi-wallet.online/2288221025nn2ti.pdfIn PDF document text
- http://majikok.mygamesonline.org/1626051950.pdfIn PDF document text
- http://puwinowelin.medianewsonline.com/jafopubifuwuzapixawi.pdfIn PDF document text
- https://cdn.sqhk.co/datagemop/jieheIJ/bloody_west_infamous_legends_mod_apk_android_1.pdfIn PDF document text
- https://cdn.sqhk.co/lojumisebu/5chaheT/centurylink_change_email_address.pdfIn PDF document text
- https://cdn.sqhk.co/vuxesojogugu/UigbrOa/83396822619.pdfIn PDF document text
- http://bagomebefekixob.getenjoyment.net/inventions_and_discoveries_in_science_and_technology.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465941/normal_6041a0d7a3ae3.pdfIn PDF document text
- http://kismykeitio.best/best_offline_gps_for_iostqx3z.pdfIn PDF document text
- https://cdn.sqhk.co/sujutowupolu/hf3BjeI/84568479370.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469126/normal_6047c0317263c.pdfIn PDF document text
- http://ukranews.site/wewizalokepufopexc7qj3.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://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_ee12df3758f74123bec5439ef8c47669.pdf?index=trueIn PDF document text
- https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_daefc062957a499c890ab8f69035692a.pdf?index=trueIn PDF document text
- https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_e85d5898811d488b903f0b7bbd0e1a5f.pdf?index=trueIn PDF document text
- https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_be57ba3282d341e2be3019277f2bf590.pdf?index=trueIn PDF document text
- https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_7b26c16a7c374e5091e0a64603629fb5.pdf?index=trueIn PDF document text
- https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_33aa76997e9c4671a038240c53d22d97.pdf?index=trueIn 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_off0000e6c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6C6	5368 bytes
SHA-256: `0aebbdf45be8ab04e1da49bd21847fc656e186e8d52a7bda42a3a8f900afb318`
`font_01_sfnt_off0000f8df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8DF	11112 bytes
SHA-256: `cb2222123b3ee8ff7a787c54ff190fc2a12873aad84269c5aba8e27cebc7a09d`
`font_02_sfnt_off00011e5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E5C	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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