PDF malware analysis — malicious · 26a21ce095be2432

MALICIOUS

PDF

81.2 KB Created: 2021-03-22 21:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 405ea09ac82350a418fca6daf64a645a SHA-1: dd68bd48d22f4fc83bcf99a85bdcde2f82d5a929 SHA-256: 26a21ce095be243226f69c6b491c2c394b4db9fd6671934fe48640a7e4125f5c

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one prominent URL pointing to 'mezovuduw.ru', suggesting it's part of a link farm or phishing campaign. The document body, though heavily obfuscated, contains metadata related to PDF generation, and the presence of embedded links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://mezovuduw.ru/award?keyword=metabolic+disorders+in+cattle+pdf PDF link annotation
- https://zegoliro.weebly.com/uploads/1/3/2/3/132303320/62c85c1b467c2d.pdfIn PDF document text
- https://gosazakinuda.weebly.com/uploads/1/3/4/8/134861856/rusekig.pdfIn PDF document text
- https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/2aa68a21c.pdfIn PDF document text
- http://tejowigasinafu.getenjoyment.net/miguel_street_characters.pdfIn PDF document text
- http://kojazunupetip.mygamesonline.org/94949226117.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/567d11a5-b2c8-43b0-801e-863c8920ce29/80297198273.pdfIn PDF document text
- https://s3.amazonaws.com/sifawekujiki/alfred_2_app.pdfIn PDF document text
- http://jowokepo.atwebpages.com/fuluwuxogego.pdfIn PDF document text
- https://s3.amazonaws.com/diwitapezu/65225725148.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c4e8d720-34f7-4344-9880-040e3282cfdb/cuanto_mide_3_8_de_pulgada_en_centimetros.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/823f279a-67a7-46db-97dd-bb536688c9c1/niniriwiz.pdfIn PDF document text
- https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_4e33a5de13a14c1b8505d3df3529477b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bifadiwuwileji/ford_mustang_mach_1_price_in_canada.pdfIn PDF document text
- https://s3.amazonaws.com/mutirexa/astronaut_wives_club_episode_guide.pdfIn PDF document text
- https://s3.amazonaws.com/setikizo/what_is_legal_english.pdfIn PDF document text
- https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_55e62ef872b54ea684af553eff0e1dfa.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/rogugagatuf/81880433901.pdfIn PDF document text
- https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_53a12ae5943e4cbdbe9906831de07551.pdf?index=trueIn PDF document text
- https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_d3de8f78f4844c88b045f780b5f1f215.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/7a3cb28a-5097-419f-aae3-76667014b17c/weider_crossbow_advantage_parts.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/076393a8-a545-4df0-afc0-30f573b46771/polk_psw10_review.pdfIn PDF document text
- https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_8f57618f37344919b644923ed3e47138.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000100a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100A5	5292 bytes
SHA-256: `e0d46fe2f4023e009f9e26dccccb00ad624e254a1cef4c98f77b20518272bbdb`
`font_01_sfnt_off000112b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112B6	10808 bytes
SHA-256: `b3577f3c328e62b5d9a755611b206a4cb073370f87fccc543642a79151a896af`

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