PDF malware analysis — malicious · c3ebc2891f126f23

MALICIOUS

PDF

87.2 KB Created: 2021-04-03 19:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0b967bc17262fd457d3e4c76209f2771 SHA-1: 9baab83eade62c92c7d731849ff6e3eaf646507a SHA-256: c3ebc2891f126f237efb8bfacc12cfe03700c89086dbd826c6b95f3ec40d7d0b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL `https://dafemum.ru/wix?keyword=skyrim+requiem+setup` suggests a lure to download a file, likely a payload. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a phishing or downloader attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://dafemum.ru/wix?keyword=skyrim+requiem+setup
- http://watomidipokaki.22web.org/edgenuity_algebra_2_answers.pdf
- http://kosolibanun.iblogger.org/handwriting_lines_template_for_smartboard.pdf
- http://kuzaduxojotijid.22web.org/24582173659.pdf
- http://mufosubofamar.mywebcommunity.org/63383887588.pdf
- http://gusanod.22web.org/an_introduction_to_critical_discourse_analysis_in_education.pdf
- http://kewotij.mypressonline.com/tracfone_lg_reflect.pdf
- https://cdn-cms.f-static.net/uploads/4411500/normal_60464ce92f18f.pdf
- https://static.s123-cdn-static.com/uploads/4370746/normal_5fe18bad473de.pdf
- https://static.s123-cdn-static.com/uploads/4416302/normal_5fe53e366e8d4.pdf
- https://cdn-cms.f-static.net/uploads/4372681/normal_602d7f9806fa5.pdf
- http://sefobadivura.iblogger.org/rivok.pdf
- http://wuwisometojone.66ghz.com/68927066508.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- http://jejavonafire.epizy.com/ziwutatune.pdf
- https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_cd796ab95b884404a48b96f875d2a572.pdf?index=true
- https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_396cc9a71fd44e43ad34a8b3316998ab.pdf?index=true
- http://wetepizibora.rf.gd/47842356403.pdf
- https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_778bcec5b3db471789b34fc0c7f0e281.pdf?index=true
- http://sofibimibojas.myartsonline.com/what_is_dynamic_between_local_and_global_cultural_production.pdf
- http://vawerudarasikow.myartsonline.com/how_to_run_a_2-3_zone_in_basketball.pdf
- https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_7dfb12f48ace48bdab6543874cd58d85.pdf?index=true
- https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_048e80a589fb45999dcf3d2faebba751.pdf?index=true
- http://xezevoxanomidul.rf.gd/argumentation_and_debate_freeley_steinberg.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010bcb.bin` `b229369579522a90f985167e2a72aab51841381a78d77d1fc51dd45c76264bdc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BCB	4784 bytes
`font_01_sfnt_off00011c20.bin` `d28a56f0a7cc91cca89468a9d41a649a195b25ca6da89c832b2ac42a6451689b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C20	10996 bytes
`font_02_sfnt_off000141a3.bin` `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141A3	4324 bytes

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