PDF malware analysis — malicious · b4542b1a02cc13e1

MALICIOUS

PDF

84.7 KB Created: 2021-03-30 02:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 50478d3636e5ca8b4a090db07ab6fd79 SHA-1: 04b3a0356b6d6188dd01e2d863b0fde3a8bb6580 SHA-256: b4542b1a02cc13e18d000cbda369e7f1069e1146417e2bc90dfadce1f60a2923

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm, directing users to multiple disposable hosting sites, one of which is http://dasiroxejipi.22web.org/lupawizirak.pdf. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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 http://dasiroxejipi.22web.org/lupawizirak.pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4469128/normal_6033e2a5de75d.pdfIn PDF document text
- https://dudisavaw.weebly.com/uploads/1/3/1/3/131380109/09c6de085f.pdfIn PDF document text
- https://wezawelo.weebly.com/uploads/1/3/0/8/130813956/6317906.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420014/normal_6018161a20bb5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455405/normal_605af14fa532b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501484/normal_6003fce936e75.pdfIn PDF document text
- https://mufewikusa.weebly.com/uploads/1/3/4/0/134042586/bf7e7d2f.pdfIn PDF document text
- http://gizolip.iblogger.org/brachistochrone_problem_solution.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://feedproxy.google.com/~r/wb/ENAH/~3/n4t4wXRn-MA/wb?keyword=verb%20to%20be%20exercises%20pdf%20elementaryPDF link annotation
- http://sajulugebimisu.myartsonline.com/16263634735.pdfIn PDF document text
- https://s3.amazonaws.com/dazawojob/jegemaxejas.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ed0a27e8-6042-4bdd-99e3-04ca4d60493d/27946508193.pdfIn PDF document text
- http://pasofotamuteper.atwebpages.com/lesiones_de_la_lengua.pdfIn PDF document text
- http://dejuluv.epizy.com/pufosej.pdfIn PDF document text
- http://dozesika.epizy.com/zopobuzibemojodupatiki.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/37e0a3ca-6a21-4d1a-8c17-06b91d42b9de/40923085687.pdfIn PDF document text
- https://s3.amazonaws.com/megelugik/appvn_ios_2018.pdfIn PDF document text
- https://s3.amazonaws.com/jokotaziweluge/vemalejimivulubogitowim.pdfIn PDF document text
- https://s3.amazonaws.com/sefiwegegagu/gogewoxo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/04c219d0-3b90-4609-b135-51a6b02e45cb/11678331653.pdfIn PDF document text
- https://s3.amazonaws.com/webipejonavuv/7908067170.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f00e4886-5a37-4dbe-9302-23bddeb30d86/what_do_information_technology_specialist_do.pdfIn PDF document text
- http://xodolipifonabo.epizy.com/vuvagisabidumubevetevi.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f770.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF770	5576 bytes
SHA-256: `59d990a00ce63003ef9c61f5fef417c4f96643d5ae8f5058b83d3c4631b0d85a`
`font_01_sfnt_off00010a5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A5B	10472 bytes
SHA-256: `8fd9b48865aaa3108159aaa941f8b970a42fa8afce1f0ba449c991e552537fb8`
`font_02_sfnt_off00012e65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E65	16204 bytes
SHA-256: `e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15`

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